Assume that the data has a normal distribution


Question 1

  1.  

Assume that the axioms has a recognized classification and the compute of observations is important than fifty. Confront the crucial z prize used to flag a inoperative theory. 1T1= 0.09 for a right-tailed flag.

Answer

  

±1.96

  

1.34

  

±1.34

  

1.96

5 points  

Question 2

  1.  

Find the prize of the flag statistic z using z = 1T2The demand is that the scold of drowning deaths of effect ascribable to beaches is past than 0.25, and the pattern statistics include n = 681 drowning deaths of effect delay 30% of them ascribable to beaches.

Answer

  

3.01

  

2.85

  

-2.85

  

-3.01

5 points  

Question 3

  1.  

Use the ardent advice to confront the P-value. Also, use a 0.05 soundness congruousize and set-forth the omission encircling the inoperative theory (throw-by the inoperative theory or miss to throw-by the inoperative theory). The flag statistic in a left-tailed flag is z = -1.83.

Answer

  

0.0672; throw-by the inoperative theory

  

0.0336; throw-by the inoperative theory

  

0.9664; miss to throw-by the inoperative theory

  

0.0672; miss to throw-by the inoperative theory

5 points  

Question 4

  1.  

Use the ardent advice to confront the P-value. Also, use a 0.05 soundness congruousize and set-forth the omission encircling the inoperative theory (throw-by the inoperative theory or miss to throw-by the inoperative theory). Delay H1: p < 3/5, the flag statistic is z = -1.68.

Answer

  

0.093; miss to throw-by the inoperative theory

  

0.0465; miss to throw-by the inoperative theory

  

0.0465; throw-by the inoperative theory

  

0.9535; miss to throw-by the inoperative theory

5 points  

Question 5

  1.  

Formulate the implied omission in nontechnical conditions. Be safe to discourse the primordial demand. The proprietor of a football team demands that the medium apparatus at games is aggravate 694, and he is consequently justified in emotional the team to a city delay a larger stadium. Assuming that a theory flag of the demand has been conducted and that the omission is missafe to throw-by the inoperative theory, set-forth the omission in nontechnical conditions.

Answer

  

There is not qualified exemplification to livelihood the demand that the moderation apparatus is close than 694.

  

There is qualified exemplification to livelihood the demand that the moderation apparatus is important than 694.

  

There is qualified exemplification to livelihood the demand that the moderation apparatus is close than 694.

  

There is not qualified exemplification to livelihood the demand that the moderation apparatus is important than 694.

5 points  

Question 6

  1.  

Assume that a theory flag of the ardent demand accomplish be conducted. Identify the pattern I or pattern II fault for the flag. A consumer advocacy clump demands that the moderation mileage for the Carter Motor Company's new sedan is close than 32 miles per gallon. Identify the pattern I fault for the flag.

Answer

  

Fail to throw-by the demand that the moderation is congruous to 32 miles per gallon when it is in-fact important than 32 miles per gallon.

  

Reject the demand that the moderation is congruous to 32 miles per gallon when it is in-fact close than 32 miles per gallon.

  

Reject the demand that the moderation is congruous to 32 miles per gallon when it is in-fact 32 miles per gallon.

  

Fail to throw-by the demand that the moderation is congruous to 32 miles per gallon when it is in-fact close than 32 miles per gallon.

5 points  

Question 7

  1.  

Find the P-prize for the implied theory flag. In a pattern of 88 effect clarified strayly from one town, it is set that 8 of them let from asthma. Confront the P-prize for a flag of the demand that the scold of all effect in the town who let from asthma is congruous to 11%.

Answer

  

0.2843

  

-0.2843

  

0.2157

  

0.5686

5 points  

Question 8

  1.  

Find the P-prize for the implied theory flag. An occasion in a life descriptions that 34% of American fathers accept no function for offshoot economy. A researcher demands that the delineation is remarkable for fathers in the town of Littleton. A stray pattern of 225 fathers from Littleton, yielded 97 who did not acceleration delay offshoot economy. Confront the P-prize for a flag of the researcher's demand.

Answer

  

0.0019

  

0.0015

  

0.0038

  

0.0529

5 points  

Question 9

  1.  

Find the crucial prize or prizes of ritValX2based on the ardent advice. H1: igma> 3.5 n = 14 lpha= 0.05

Answer

  

22.362

  

5.892

  

24.736

  

23.685

5 points  

Question 10

  1.  

Find the crucial prize or prizes of ritValX2based on the ardent advice. H1: igma> 26.1 n = 9 lpha= 0.01

Answer

  

1.646

  

21.666

  

20.090

  

2.088

5 points  

Question 11

  1.  

Find the compute of successes x insinuateed by the ardent set-forthment. A computer manufacturer strayly selects 2850 of its computers for temper selfreliance and confronts that 1.79% of these computers are set to be wanting.

Answer

5 points  

Question 12

  1.  

Assume that you artifice to use a soundness congruousize of alpha = 0.05 to flag the demand that p1 = p2, Use the ardent pattern sizes andaggregate of successes to confront the pooled consider -barRound your acceptance to the undeviating thousandth. n1 = 570;n2 = 1992 x1 = 143;x2 = 550

Answer

  

0.541

  

0.270

  

0.520

  

0.216

5 points  

Question 13

  1.  

Assume that you artifice to use a soundness congruousize of alpha = 0.05 to flag the demand that p1 = p2. Use the ardent pattern sizes and computes of successes to confront the z flag statistic for the theory flag. A description on the dark intelligence injudiciously set-forthd that 10 out of 108 households delay pet dogs were burglarized and 20 out of 208 delayout pet dogs were burglarized.

Answer

  

z = -0.041

  

z = -0.102

  

z = 0.000

  

z = -0.173

5 points  

Question 14

  1.  

Solve the quantity. The board shows the compute of smokers in a stray pattern of 500 adults occasion-honored 20-24 and the compute of smokers in a stray pattern of 450 adults occasion-honored 25-29. Wear that you artifice to use a soundness congruousize of alpha = 0.10 to flag the demand that 1notp2Find the crucial prize(s) for this theory flag. Do the axioms prepare qualified exemplification that the scold of smokers in the 20-24 age clump is divergent from the scold of smokers in the 25-29 age clump? 1T14

Answer

  

z = ± 1.645; yes

  

z = ± 1.28; yes

  

z = ± 1.96; no

  

z = 1.28; no

5 points  

Question 15

  1.  

Assume that you artifice to use a soundness congruousize of alpha = 0.05 to flag the demand that p1 = p2. Use the ardent pattern sizes and computes of successes to confront the P-prize for the theory flag. n1 = 50;n2 = 75 x1 = 20;x2 = 15

Answer

  

0.0032

  

0.0146

  

0.1201

  

0.0001

5 points  

Question 16

  1.  

Construct the implied trust interim for the dissimilarity betwixt population scolds p1 - p2. Wear that the patterns are stubborn and that they keep been strayly clarified. x1 = 61, n1 = 105 and x2 = 82, n2 = 120; Construct a 98% trust interim for the dissimilarity betwixt population scolds p1 - p2.

Answer

  

0.456 < p1 - p2 < 0.707

  

0.432 < p1 - p2 < 0.730

  

-0.228 < p1 - p2 < 0.707

  

-0.252 < p1 - p2 < 0.047

5 points  

Question 17

  1.  

Construct the implied trust interim for the dissimilarity betwixt the two population moderations. Wear that the two patterns are stubborn weak stray patterns clarified from recognizedly select populations. Do not wear that the population flag deviations are congruous. A researcher was animated in comparing the trusting pulse scolds of mass who application constantly and the pulse scolds of mass who do not application constantly. She obtained stubborn weak stray patterns of 16 mass who do not application constantly and 12 mass who do application constantly. The trusting pulse scolds (in beats per microscopic) were narrative and the analysis statistics are as follows. 1T17Construct a 95% trust interim for mu1 - mu2, the dissimilarity betwixt the moderation pulse scold of mass who do not application constantly and the moderation pulse scold of mass who application constantly.

Answer

  

-3.22 beats/min < mu1 - mu2 < 11.62 beats/min

  

-3.55 beats/min < mu1 - mu2 < 11.95 beats/min

  

-3.74 beats/min < mu1 - mu2 < 12.14 beats/min

  

-4.12 beats/min < mu1 - mu2 < 14.72 beats/min

5 points  

Question 18

  1.  

State what the ardent trust interim insinuates encircling the two population moderations. A researcher was animated in comparing the crisiss of women in two divergent countries. Stubborn weak stray patterns of 9 women from empire A and 9 women from empire B yielded the forthcoming crisiss (in inches). 1T18The forthcoming 90% trust interim was obtained for mu1 - mu2, the dissimilarity betwixt the moderation crisis of women in empire A and the moderation crisis of women in empire B.-4.34 in. < mu1 - mu2 < -0.03 in What does the trust interim insinuate encircling the population moderations?

Answer

  

The trust interim includes solely privative prizes which insinuates that the moderation crisis of women from empire A is important than the moderation crisis of women from empire B.

  

The trust interim includes solely privative prizes which insinuates that the two population moderations sway be congruous. There doesn't answer to be a speaking dissimilarity betwixt the moderation crisis of women from empire A and the moderation crisis of women from empire B.

  

The trust interim includes solely privative prizes which insinuates that the moderation crisis of women from empire A is smaller than the moderation crisis of women from empire B.

  

The trust interim includes 0 which insinuates that the two population moderations sway be congruous. There doesn't answer to be a speaking dissimilarity betwixt the moderation crisis of women from empire A and the moderation crisis of women from empire B.

5 points  

Question 19

  1.  

Construct the implied trust interim for the dissimilarity betwixt the two population moderations. Wear that the two patterns are stubborn weak stray patterns clarified from recognizedly select populations. Also wear that the population flag deviations are congruous (sigma1 = sigma2), so that the flag fault of the dissimilarity betwixt moderations is obtained by pooling the pattern variances. A represent manufacturer wanted to parallel the arefaction occasions of two divergent patterns of represent. Stubborn weak stray patterns of 11 cans of pattern A and 9 cans of pattern B were clarified and applied to congruous surfaces. The arefaction occasions, in hours, were narrative. The analysis statistics are as follows. 1T19Construct a 99% trust interim for mu1 - mu2, the dissimilarity betwixt the moderation arefaction occasion for represent pattern A and the moderation arefaction occasion for represent pattern B.

Answer

  

-2.73 hrs < mu1 - mu2 < 7.73 hrs

  

-0.64 hrs < mu1 - mu2 < 5.64 hours

  

-1.50 hrs < mu1 - mu2 < 6.50 hrs

  

-2.01 hrs < mu1 - mu2 < 7.01 hrs

5 points  

Question 20

  1.  

The two axioms sets are resting. Confront -barto the undeviating tenth. 1T20

Answer

  

44.1

  

20.3

  

33.9

  

203.4