Math | Mathematics homework help
SHORT ANSWER. Write the declaration or peculiarity that best completes each declaration or answers the topic.
Solve the quantity.
1) A chance specimen of 700 exalted develop seniors is ardent the SAT-V rule. The medium beak for this specimen is overbar(x) = 487. What can you say environing the medium beak m of all exalted develop seniors? 1) ______________
2) The action apex middles for 10 chancely separated wards in a statistics collocate after a while 125 wards are listed beneath. What can you say environing the medium beak m of all 125 wards?
3.7 2.5 2.3 2.0 2.6 3.5 2.1 2.8 2.4 3.6 2) ______________
3) A incontrovertible dependence in intermission is 8.35 < m < 9.85. Find the specimen medium overbar(x) and the fallacy of love E. 3) ______________
MULTIPLE CHOICE. Choose the one notion that best completes the declaration or answers the topic.
4) Given the similar specimen statistics, which roll of dependence conciliate amount the narrowest dependence intermission? 4) ________
A) 75% B) 85% C) 90% D) 95%
5) The action apex middles for 10 chancely separated wards in a statistics collocate after a while 125 wards are listed beneath.
2.0 3.2 1.8 2.9 0.9 4.0 3.3 2.9 3.6 0.8
What is the issue on the width of the dependence intermission if the specimen dimension is increased to 20? 5) ________
A) The width decreases.
B) The width increases.
C) The width dregs the similar.
D) It is impracticable to set-forth after a whileout further knowledge.
6) Find the fastidious esteem _elementsubscript_element that corresponds to a 94% dependence roll. 6) ________
A) plusminus1.88 B) plusminus1.645 C) plusminus1.96 D) plusminus2.33
7) Determine the fallacy of love if the action apex middles for 10 chancely separated wards from a collocate of 125 wards has a medium of overbar(x) = 2.0. Assume the action apex middle of the 125 wards has a medium of m = 2.5. 7) ________
A) 0.5 B) 2.25 C) - 0.5 D) 1.75
8) A chance specimen of 50 wards has a rule beak middle after a while a rule rupture of 11.4. Find the apex fallacy of love if c = 0.98. 8) ________
A) 3.76 B) 0.53 C) 1.61 D) 1.58
SHORT ANSWER. Write the declaration or peculiarity that best completes each declaration or answers the topic.
9) In a new con-over of 71 eighth actionrs, the medium enumerate of hours per week that they watched television was 18.7 after a while a rule rupture of 5.8 hours.
a) Find the 98% dependence intermission of the medium.
b) If the rule rupture is doubled to 11.6, what conciliate be the issue on the dependence intermission? 9) ______________
MULTIPLE CHOICE. Choose the one notion that best completes the declaration or answers the topic.
10) A chance specimen of 150 wards has a action apex middle after a while a medium of 2.86 and after a while a rule rupture of 0.78. Build the dependence intermission for the population medium, m, if c = 0.98. 10) _______
A) (2.71, 3.01) B) (2.51, 3.53) C) (2.43, 3.79) D) (2.31, 3.88)
11) A chance specimen of 40 wards has a rule beak after a while overbar(x) = 81.5 and s = 10.2. Build the dependence intermission for the population medium, m if c = 0.90. 11) _______
A) (78.8, 84.2) B) (51.8, 92.3) C) (66.3, 89.1) D) (71.8, 93.5)
12) A chance specimen of 40 wards has a medium annual rights of $3120 and a rule rupture of $677. Build the dependence intermission for the population medium, m if c = 0.95. 12) _______
A) ($2910, $3330) B) ($210, $110)
C) ($4812, $5342) D) ($1987, $2346)
13) A chance specimen of 56 fluorescent empty bulbs has a medium animation of 645 hours after a while a rule rupture of 31 hours. Build a 95% dependence intermission for the population medium. 13) _______
A) (636.9, 653.1) B) (539.6, 551.2)
C) (112.0, 118.9) D) (712.0, 768.0)
14) A class of 49 chancely separated wards has a medium age of 22.4 years after a while a rule rupture of 3.8. Build a 98% dependence intermission for the population medium. 14) _______
A) (21.1, 23.7) B) (20.3, 24.5) C) (19.8, 25.1) D) (18.8, 26.3)
15) A class of 40 bowlers showed that their middle beak was 192 after a while a rule rupture of 8. Find the 95% dependence intermission of the medium beak of all bowlers. 15) _______
A) (189.5, 194.5) B) (186.5, 197.5)
C) (188.5, 195.6) D) (187.3, 196.1)
16) In a chance specimen of 60 computers, the medium retrieve absorb was $150 after a while a rule rupture of $36. Build a 99% dependence intermission for the population medium. 16) _______
A) ($138, $162) B) ($18, $54) C) ($238, $274) D) ($537, $654)
17) In a new con-over of 42 eighth actionrs, the medium enumerate of hours per week that they watched television was 19.6 after a while a rule rupture of 5.8 hours. Find the 98% dependence intermission for the population medium. 17) _______
A) (17.5, 21.7) B) (14.1, 23.2) C) (18.3, 20.9) D) (19.1, 20.4)
18) In a specimen of 10 chancely separated women, it was endow that their medium summit was 63.4 inches. From preceding studies, it is inconsequent that the rule rupture, s, is 2.4. Build the 95% dependence intermission for the population medium. 18) _______
A) (61.9, 64.9) B) (58.1, 67.3) C) (59.7, 66.5) D) (60.8, 65.4)
SHORT ANSWER. Write the declaration or peculiarity that best completes each declaration or answers the topic.
19) There were 800 math instructors at a mathematics assemblage. Forty instructors were chancely separated and ardent an IQ rule. The beaks amountd a medium of 130 after a while a rule rupture of 10. Find a 95% dependence intermission for the medium of the 800 instructors. Use the terminable population amercement ingredient. 19) _____________
MULTIPLE CHOICE. Choose the one notion that best completes the declaration or answers the topic.
20) The rule IQ rule has a medium of 97 and a rule rupture of 18. We omission to be 95% incontrovertible that we are after a whilein 5 IQ apexs of the penny medium. Determine the required specimen dimension. 20) _______
A) 50 B) 8 C) 147 D) 1
21) A entertain at a national hospital is assiduous in estimating the parentage moment of infants. How great a specimen must she prime if she desires to be 99% sanguine that the penny medium is after a whilein 3 ounces of the specimen medium? The rule rupture of the parentage moments is unreserved to be 8 ounces. 21) _______
A) 48 B) 47 C) 7 D) 6
SHORT ANSWER. Write the declaration or peculiarity that best completes each declaration or answers the topic.
22) In direct to set rates, an security association is complicated to love the enumerate of disordered days that bountiful date workers at an auto retrieve stock charm per year. A preceding con-over indicated that the rule rupture was 2.2 days. a) How great a specimen must be separated if the association omissions to be 95% sanguine that the penny medium be-unlikes from the specimen medium by no further than 1 day? b) Repeat distribute-among-among (a) using a 98% dependence intermission. Which roll of dependence requires a greatr specimen dimension? Explain. 22) _____________
MULTIPLE CHOICE. Choose the one notion that best completes the declaration or answers the topic.
23) Find the fastidious esteem, _elementsubscript_element for c = 0.99 and n = 10. 23) _______
A) 3.250 B) 2.2821 C) 2.262 D) 1.833
24) Find the fastidious esteem, _elementsubscript_element, for c = 0.95 and n = 16. 24) _______
A) 2.131 B) 1.753 C) 2.602 D) 2.947
25) Find the fastidious esteem, _elementsubscript_element, for c = 0.90 and n = 15. 25) _______
A) 1.761 B) 1.345 C) 2.145 D) 2.624
26) Find the esteem of E, the apex fallacy of love, for c = 0. 90, n = 16 and s = 2.3. 26) _______
A) 1.01 B) 0.25 C) 0.77 D) 0.19
27) Find the esteem of E, the apex fallacy of love, for c = 0. 99, n = 10 and s = 3.8. 27) _______
A) 3.91 B) 3.39 C) 1.23 D) 3.81
28) Find the esteem of E, the apex fallacy of love, for c = 0. 99, n = 15 and s = 5.1. 28) _______
A) 3.92 B) 4.02 C) 3.46 D) 1.01
SHORT ANSWER. Write the declaration or peculiarity that best completes each declaration or answers the topic.
29) Construct a 98% dependence intermission for the population medium, m. Assume the population has a natural classification. A chance specimen of 20 academy wards has medium annual rights of $3480 after a while a rule rupture of $668. 29) _____________
30) Construct a 95% dependence intermission for the population medium, m. Assume the population has a natural classification. In a chance specimen of 26 computers, the medium retrieve absorb was $160 after a while a rule rupture of $34. 30) _____________
31) a) Build a 95% dependence intermission for the population medium, m. Assume the population has a natural classification. In a chance specimen of 26 computers, the medium retrieve absorb was $174 after a while a rule rupture of $37.
b) Suppose you did some elimination on retrieve absorbs for computers and endow that the rule rupture is sigma = 37. Use the natural classification to build a 95% dependence intermission for the population medium, m. Compare the results. 31) _____________
32) A creator receives an direct for fluorescent empty bulbs. The direct requires that the bulbs feel a medium animation two of 850 hours. The creator primes a chance specimen of 25 fluorescent empty bulbs and finds that they feel a medium animation two of 845 hours after a while a rule rupture of 15 hours. Rule to see if the creator is making jocular empty bulbs. Use a 95% dependence roll. Assume the axioms are naturally as sorted. 32) _____________
MULTIPLE CHOICE. Choose the one notion that best completes the declaration or answers the topic.
33) Construct a 95% dependence intermission for the population medium, m. Assume the population has a natural classification. A specimen of 20 academy wards had medium annual rights of $3120 after a while a rule rupture of $677. 33) _______
A) ($2803, $3437) B) ($1324, $1567)
C) ($2135, $2567) D) ($2657, $2891)
34) Construct a 90% dependence intermission for the population medium, m. Assume the population has a natural classification. A specimen of 15 chancely separated wards has a action apex middle of 2.86 after a while a rule rupture of 0.78. 34) _______
A) (2.51, 3.21) B) (2.41, 3.42) C) (2.37, 3.56) D) (2.28, 3.66)
35) Construct a 95% dependence intermission for the population medium, m. Assume the population has a natural classification. A specimen of 25 chancely separated wards has a medium rule beak of 81.5 after a while a rule rupture of 10.2. 35) _______
A) (77.29, 85.71) B) (56.12, 78.34)
C) (66.35, 69.89) D) (87.12, 98.32)
36) Construct a 95% dependence intermission for the population medium, m. Assume the population has a natural classification. A chance specimen of 16 fluorescent empty bulbs has a medium animation of 645 hours after a while a rule rupture of 31 hours. 36) _______
A) (628.5, 661.5) B) (876.2, 981.5)
C) (531.2, 612.9) D) (321.7, 365.8)
37) Construct a 99% dependence intermission for the population medium, m. Assume the population has a natural classification. A class of 19 chancely separated wards has a medium age of 22.4 years after a while a rule rupture of 3.8 years. 37) _______
A) (19.9, 24.9) B) (16.3, 26.9) C) (17.2, 23.6) D) (18.7, 24.1)
38) Construct a 98% dependence intermission for the population medium, m. Assume the population has a natural classification. A con-over of 14 bowlers showed that their middle beak was 192 after a while a rule rupture of 8. 38) _______
A) (186.3, 197.7) B) (222.3, 256.1)
C) (328.3, 386.9) D) (115.4, 158.8)
39) Construct a 90% dependence intermission for the population medium, m. Assume the population has a natural classification. In a new con-over of 22 eighth actionrs, the medium enumerate of hours per week that they watched television was 19.6 after a while a rule rupture of 5.8 hours. 39) _______
A) (17.47, 21.73) B) (18.63, 20.89)
C) (5.87, 7.98) D) (19.62, 23.12)
40) A chance specimen of 10 parking meters in a shore unity showed the aftercited incomes for a day. Assume the incomes are naturally as sorted.
$3.60 $4.50 $2.80 $6.30 $2.60 $5.20 $6.75 $4.25 $8.00 $3.00
Find the 95% dependence intermission for the penny medium. 40) _______
A) ($3.39, $6.01) B) ($2.11, $5.34)
C) ($4.81, $6.31) D) ($1.35, $2.85)
41) The action apex middles for 10 chancely separated exalted develop wards are listed beneath. Assume the action apex middles are naturally as sorted.
2.0 3.2 1.8 2.9 0.9 4.0 3.3 2.9 3.6 0.8
Find a 98% dependence intermission for the penny medium. 41) _______
A) (1.55, 3.53) B) (0.67, 1.81) C) (2.12, 3.14) D) (3.11, 4.35)
42) A national bank needs knowledge touching the checking declaration counterpoises of its customers. A chance specimen of 15 declarations was checked. The medium counterpoise was $686.75 after a while a rule rupture of $256.20. Find a 98% dependence intermission for the penny medium. Assume that the declaration counterpoises are naturally as sorted. 42) _______
A) ($513.17, $860.33) B) ($238.23, $326.41)
C) ($326.21, $437.90) D) ($487.31, $563.80)
43) When 475 academy wards were reviewed, 125 said they own their car. Find a apex love for p, the population correlation of wards who own their cars. 43) _______
A) 0.263 B) 0.737 C) 0.357 D) 0.208
44) A review of 100 mortal accidents showed that 11 were alcohol allied. Find a apex love for p, the population correlation of accidents that were alcohol allied. 44) _______
A) 0.11 B) 0.89 C) 0.124 D) 0.099
45) A review of 500 non-mortal accidents showed that 118 complicated the use of a cell phone. Find a apex love for p, the population correlation of accidents that complicated the use of a cell phone. 45) _______
A) 0.236 B) 0.764 C) 0.309 D) 0.191
46) A review of 250 households showed 37 owned at last one gun. Find a apex love for p, the population correlation of households that own at last one gun. 46) _______
A) 0.148 B) 0.852 C) 0.174 D) 0.129
47) A review of 2490 golfers showed that 347 of them are left-handed. Find a apex love for p, the population correlation of golfers that are left-handed. 47) _______
A) 0.139 B) 0.861 C) 0.162 D) 0.122
SHORT ANSWER. Write the declaration or peculiarity that best completes each declaration or answers the topic.
48) When 385 academy wards were reviewed, 160 said they own their car. Build a 95% dependence intermission for the correlation of academy wards who say they own their cars. 48) _____________
49) A review of 600 non-mortal accidents showed that 166 complicated the use of a cell phone. Build a 99% dependence intermission for the correlation of mortal accidents that complicated the use of a cell phone. 49) _____________
MULTIPLE CHOICE. Choose the one notion that best completes the declaration or answers the topic.
50) A review of 100 mortal accidents showed that 52 were alcohol allied. Build a 98% dependence intermission for the correlation of mortal accidents that were alcohol allied. 50) _______
A) (0.404, 0.636) B) (0.120, 0.340)
C) (0.560, 0.580) D) (0.880, 0.900)
51) A review of 250 households showed 62 owned at last one gun. Build a 90% dependence intermission for the correlation of households that own at last one gun. 51) _______
A) (0.203, 0.293) B) (0.103, 0.189)
C) (0.369, 0.451) D) (0.683, 0.712)
52) A review of 2450 golfers showed that 281 of them are left-handed. Build a 98% dependence intermission for the correlation of golfers that are left-handed. 52) _______
A) (0.100, 0.130) B) (0.203, 0.293)
C) (0.369, 0.451) D) (0.683, 0.712)
SHORT ANSWER. Write the declaration or peculiarity that best completes each declaration or answers the topic.
53) In a review of 10 golfers, 2 were endow to be left-handed. Is it skilled to build the 90% dependence intermission for the population correlation, p? Explain.
53) _____________
MULTIPLE CHOICE. Choose the one notion that best completes the declaration or answers the topic.
54) A eliminationer at a elder hospital wishes to love the correlation of the adult population of the United States that has exalted class urgency. How great a specimen is needed in direct to be 98% sanguine that the specimen correlation conciliate not be-unlike from the penny correlation by further than 6%? 54) _______
A) 378 B) 10 C) 755 D) 267
55) A pollster wishes to love the correlation of United States voters who predilection principal amercement. How great a specimen is needed in direct to be 90% sanguine that the specimen correlation conciliate not be-unlike from the penny correlation by further than 4%? 55) _______
A) 423 B) 256 C) 11 D) 846
56) A privy notion poll is conducted for a politician to determine what correlation of the population predilections decriminalizing marijuana ownership. How great a specimen is needed in direct to be 95% sanguine that the specimen correlation conciliate not be-unlike from the penny correlation by further than 3%? 56) _______
A) 1068 B) 752 C) 2135 D) 17
57) A creator of golf equipment wishes to love the enumerate of left-handed golfers. How great a specimen is needed in direct to be 99% sanguine that the specimen correlation conciliate not be-unlike from the penny correlation by further than 6%? A preceding con-over indicates that the correlation of left-handed golfers is 10%. 57) _______
A) 166 B) 136 C) 185 D) 38
58) A eliminationer wishes to love the enumerate of households after a while two cars. How great a specimen is needed in direct to be 95% sanguine that the specimen correlation conciliate not be-unlike from the penny correlation by further than 5%? A preceding con-over indicates that the correlation of households after a while two cars is 24%. 58) _______
A) 281 B) 198 C) 369 D) 4
SHORT ANSWER. Write the declaration or peculiarity that best completes each declaration or answers the topic.
59) A set-forth exaltedway keeper functional wishes to love the enumerate of drivers that achieve the accelerate season traveling a incontrovertible course.
a) How great a specimen is needed in direct to be 90% sanguine that the specimen correlation conciliate not be-unlike from the penny correlation by further than 2%?
b) Repeat distribute-among-among (a) bombastic preceding studies endow that 85% of drivers on this course achieveed the accelerate season. 59) _____________
MULTIPLE CHOICE. Choose the one notion that best completes the declaration or answers the topic.
60) Find the fastidious esteems, X after a while (superscript (stacked) and subscript (~%3)) and X after a while (superscript (stacked) and subscript (~%3)), for c = 0.95 and n = 12. 60) _______
A) 3.816 and 21.920 B) 3.053 and 24.725
C) 4.575 and 26.757 D) 2.603 and 19.675
61) Find the fastidious esteems, X after a while (superscript (stacked) and subscript (~%3)) and X after a while (superscript (stacked) and subscript (~%3)), for c = 0.90 and n = 15. 61) _______
A) 6.571 and 23.685 B) 4.075 and 31.319
C) 4.660 and 29.131 D) 5.629 and 26.119
62) Find the fastidious esteems, X after a while (superscript (stacked) and subscript (~%3)) and X after a while (superscript (stacked) and subscript (~%3)), for c = 0.98 and n = 20. 62) _______
A) 7.633 and 36.191 B) 6.844 and 27.204
C) 8.907 and 38.582 D) 10.117 and 32.852
63) Find the fastidious esteems, X after a while (superscript (stacked) and subscript (~%3)) and X after a while (superscript (stacked) and subscript (~%3)), for c = 0.99 and n = 10. 63) _______
A) 1.735 and 23.587 B) 2.156 and 25.188
C) 2.088 and 21.666 D) 2.558 and 23.209
64) Construct a 95% dependence intermission for the population rule rupture s of a chance specimen of 15 men who feel a medium moment of 165.2 pounds after a while a rule rupture of 12.4 pounds. Assume the population is naturally as sorted. 64) _______
A) ( 9.1, 19.6) B) ( 82.4, 382.4) C) ( 2.6, 5.6) D) ( 9.5, 18.1)
65) Assume that the summits of men are naturally as sorted. A chance specimen of 16 men feel a medium summit of 67.5 inches and a rule rupture of 2.6 inches. Build a 99% dependence intermission for the population rule rupture, s. 65) _______
A) ( 1.8, 4.7) B) ( 1.8, 4.8) C) ( 1.1, 2.9) D) ( 1.8, 4.4)
66) Assume that the summits of women are naturally as sorted. A chance specimen of 20 women feel a medium summit of 62.5 inches and a rule rupture of 1.4 inches. Build a 98% dependence intermission for the population hostility, sigma to government of (2). 66) _______
A) ( 1.0, 4.9) B) ( 1.0, 2.2) C) ( 0.7, 3.5) D) ( 1.1, 5.1)
67) The medium vindication date for a chance specimen of 12 microwave ovens is 8.6 years after a while a rule rupture of 2.7 years. Build the 98% dependence intermission for the population hostility, sigma to government of (2). Assume the axioms are naturally as sorted 67) _______
A) ( 3.2, 26.3) B) ( 1.8, 5.1) C) ( 1.2, 9.7) D) ( 3.1, 22.5)
68) A ward chancely primes 10 CDs at a place-of-business. The medium is $8.75 after a while a rule rupture of $1.50. Build a 95% dependence intermission for the population rule rupture, s. Assume the axioms are naturally as sorted. 68) _______
A) ($1.03, $2.74) B) ($0.43, $1.32)
C) ($1.43, $2.70) D) ($1.76, $3.10)
SHORT ANSWER. Write the declaration or peculiarity that best completes each declaration or answers the topic.
69) The summits (in inches) of 20 chancely separated adult males are listed beneath. Build a 99% dependence intermission for the hostility, sigma to government of (2). Assume the population is naturally as sorted.
70 72 71 70 69 73 69 68 70 71
67 71 70 74 69 68 71 71 71 72 69) _____________
MULTIPLE CHOICE. Choose the one notion that best completes the declaration or answers the topic.
70) The action apex middles for 10 chancely separated wards are listed beneath. Build a 90% dependence intermission for the population rule rupture, s. Assume the axioms are naturally as sorted.
2.0 3.2 1.8 2.9 0.9 4.0 3.3 2.9 3.6 0.8 70) _______
A) (0.81, 1.83) B) (0.32, 0.85) C) (0.53, 1.01) D) (1.10, 2.01)
SHORT ANSWER. Write the declaration or peculiarity that best completes each declaration or answers the topic.
71) A comprehender of car oil is supposed to comprehend 1000 milliliters of oil. A peculiarity administer superintendent omissions to be unquestioning that the rule rupture of the oil comprehenders is near than 20 milliliters. He chancely primes 10 cans of oil after a while a medium of 997 milliliters and a rule rupture of 32 milliliters. Use these specimen results to build a 95% dependence intermission for the penny esteem of s. Does this dependence intermission propose that the change in the oil comprehenders is at an jocular roll? 71) _____________