# Suppose a random sample of 49 is selected from a population

Suppose a chance specimen of 49 is separated from a population delay a gauge disconnection of 14. If the specimen medium is 125, the 99% dependence determination to judge the population medium is betwixt ____________ .

120.00 and 130.00

119.85 and 133.15

119.85 and 130.15

119.85 and 135.15

118.00 and 132.00

A chance specimen of 49 separated from a population delay a gauge disconnection of 14 yielded a medium = 125. The medium and the gauge disconnection of the classification of the specimen mediums are ____________ .

125 and 2

125 and 49

120 and 2

125 and 1.33

125 and 14

For a chance specimen of 36 aces and a specimen medium of 211, scold a 95% dependence determination for μ if the population gauge disconnection is 23. Round the repartees to 2 decimal places.

≤ μ ≤ .

The tolerance is +/ 0.05

A chance specimen of magnitude 70 is captured from a population that has a discord of 49. The specimen medium is 90.4. What is the aim judge of μ? Form a 94% dependence determination for μ.

*Round your repartees to 2 decimal places, the tolerance is +/0.01.

The aim judge of μ is .

The 94% dependence determination: * ≤ μ ≤ *

Question 14

Use the forthcoming instruction to form the dependence determinations restricted to judge μ.

a. 95% dependence for = 26, σ = 4.5, and n = 60

b. 98% dependence for = 117.6, σ = 26.89, and n = 75

c. 90% dependence for = 2.419, σ = 0.891, and n = 32

d. 80% dependence for = 53.7, σ = 13.1, N = 500, and n = 47

*Round your repartee to 2 decimal places, the tolerance is +/0.01.

**Round your repartee to 3 decimal places, the tolerance is +/0.001.

a. * ≤ μ ≤ *

b. * ≤ μ ≤ *

c. **≤ μ ≤ **

d. * ≤ μ ≤ *

A candy association fills a 20ounce parcel of Halloween candy delay partially expanded pieces of candy. The figure of pieces of candy per parcel varies owing the parcel is sold by ponderosity. The association scantinesss to judge the figure of pieces per parcel. Inspectors chancely specimen 120 parcels of this candy and enumerate the figure of pieces in each parcel. They discaggravate that the specimen medium figure of pieces is 18.72. Assuming a population gauge disconnection of .8735, what is the aim judge of the figure of pieces per parcel? Form a 99% dependence determination to judge the medium figure of pieces per parcel for the population.

Round the repartees to 2 decimal places.

Point Estimate

≤ μ ≤

The tolerance is +/ 0.05.

The balance entirety dollar alienation at a spare-spell shop is less than that at a supermarket. Despite averageerticket alienations, spare-spell shops can stagnant be advantageous owing of the magnitude of performance, book of concern, and the markup. A inquiryer is ardent in estimating the balance alienation completionity for spare-spell shops in cosmopolitan Long Island. To do so, she chancely specimend 24 alienations from irrelative spare-spell shops in cosmopolitan Long Island and tabulated the completionitys to the right dollar. Use the forthcoming grounds to form a 90% dependence determination for the population balance completionity of alienations. Assume that the population gauge disconnection is 3.23 and the population is normally as sorted.

$2

5

14

4

$11

4

7

1

$8

2

6

3

$7

1

3

6

$9

10

7

8

$3

8

2

4

Round the repartees to 3 decimal places.

≤ μ ≤

The tolerance is +/ 0.005.

In regulate to form a 90% dependence determination for the population medium when the population gauge disconnection σ is unrecognized and the specimen of magnitude n = 18, the misapply ttreasure to use is represented by ____________.

t 0.90, 18

t 0.05, 18

t 0.05, 17

t 0.10, 18

In regulate to form a 99% dependence determination for the population medium when the population gauge disconnection σ is unrecognized and the specimen of magnitude n = 20, the misapply ttreasure to use is represented by ____________.

t 0.01, 19

t 0.05, 19

t 0.005, 19

t 0.99, 20

The consideration t treasure associated delay the excellent 5% of the t classification and 12 degrees of insubservience is __________.

2.179

3.330

1.782

3.055

1.356

The consideration t treasure associated delay the excellent 10% of the t classification and 23 degrees of insubservience is __________.

1.714

1.319

1.321

2.069

2.332

A social case marketing secure attempts towing affirmrs delay a mail antagonism that involves a challenge using case stickers. Often when herd afunshaken to cases in this fashion they wonder up for multiple case subsidys. Suppose the marketing secure scantinesss to judge the balance figure of subsidys per customer of those who alienation at moderationest one subsidy. To do so, the marketing secure’s inquiryer chancely selects 65 returned challenge entries. Twentyseven comprise subsidy requests. Of the 27, the balance figure of subsidys is 2.10, delay a gauge disconnection of .86. The inquiryer uses this instruction to scold a 98% dependence determination to

judge and assumes that x is normally as sorted. What does the inquiryer discover?

Round the repartees to 2 decimal places.

≤ μ ≤

The tolerance is +/ 0.05.

According to a test by Topaz Enterprises, a expedition auditing association, the balance blunder by expedition substitutes is $128. Suppose this shape was earned from a chance specimen of 41 expedition substitutes and the specimen gauge disconnection is $21. What is the aim judge of the social balance blunder for all expedition substitutes? Scold a 98% dependence determination for the social balance blunder domiciled on these specimen results. Assume the expedition substitute blunders are normally as sorted in the population. How ample is the determination? Interpret the determination.

Round the repartees to 3 decimal places where compulsory.

Point Judge = $ .

≤ μ ≤

Interval Width =

The tolerance is +/ 0.005.

A chance specimen of 15 aces is captured, producing a specimen medium of 2.364 delay a specimen discord of .81. Assume x is normally as sorted and form a 90% dependence determination for the population medium. Round the repartees to 3 decimal places.

≤ μ ≤

The tolerance is +/ 0.005.

According to Runzheimer International, the balance consume of a private fail for concern expeditioners in the financial activity is $1,250. Suppose another expedition activity inquiry association receives a chance specimen of 51 concern expeditioners in the financial activity and mentions that the specimen balance consume of a private fail is $1,192, delay a specimen gauge disconnection of $279. Form a 98% dependence determination for the population medium from these specimen grounds. Assume that the grounds are normally as sorted in the population. Now go tail and test the $1,250 shape published by Runzheimer International. Does it gravitate into the dependence determination scoldd from the specimen grounds? What

does it flow you?

Round your repartees to 2 decimal places, the tolerance is +/0.01.

The 98% dependence determination: ≤ μ ≤

The shape abandoned by Runzheimer Intersocial gravitates (without or internally) the dependence determination. Therefore, there is no

reason to discard the Runzheimer shape as irrelative from what we are getting domiciled on this specimen.

According to a test by Runzheimer International, the balance consume of a fastfood abstinence (quarterpound

cheeseburger, ample fries, medium delicate drain, notwithstanding taxes) in Seattle is $4.82. Suppose this shape was domiciled on a specimen of 27 irrelative establishments and the gauge disconnection was $0.37. Form a 95% dependence determination for the population medium consume for all fastfood abstinences in Seattle. Assume the consumes of a fastfood abstinence in Seattle are normally as sorted. Using the determination as a conduct, is it likely that the population medium is indeed $4.50? Why or why not?

Round the repartees to 4 decimal places.

≤ μ ≤

Since 4.50 in the determination, we are 95% certain that μ 4.50.

The tolerance is +/ 0.0005.

Assuming x is normally as sorted, use the forthcoming instruction to scold a 90% dependence determination to judge .

313

321

320

329

319

317

340

311

325

307

310

318

Round the repartees to 2 decimal places.

≤ μ ≤

The tolerance is +/ 0.05.

The marketing controller of a ample province shop scantinesss to judge the balance figure of customers who invade the shop complete five minutes. She chancely selects fiveminute determinations and enumerates the figure of arrivals at the shop.

She earns the shapes 54, 32, 41, 44, 56, 80, 49, 29, 32, and 74. The analyst assumes the figure of arrivals is normally as sorted. Using these grounds, the analyst scolds a 95% dependence determination to judge the medium treasure for all fiveminute determinations. What determination treasures does she get?

Round the middle treasures to 2 decimal places. Round your repartees to 2 decimal places, the tolerance is +/0.01.

≤ μ ≤

A meatprocessing association in the Midwest produces and markets a parcel of eight average saexperience sandwiches. The consequence is socially as sorted, and the association is ardent in skillful the balance vend figure abounding for this ace in shops despite the enumeratery. The association cannot absolve a social census to breed this instruction. Domiciled on the association instruction system’s register of all venders who push the consequence, a inquiryer for the association contacts 36 of these venders and ascertains the selling figures for the consequence. Use the forthcoming figure grounds and a population gauge disconnection of 0.113 to mention a aim judge for the social vend figure of the consequence.

Construct a 90% dependence determination to judge this figure.

$2.23

2.16

2.12

2.01

1.99

2.23

$2.11

2.31

2.07

2.24

1.87

2.10

$2.12

1.98

2.17

2.18

2.09

2.08

$2.20

2.17

2.30

2.18

2.22

2.05

$2.17

2.14

2.29

2.32

2.15

2.16

$2.10

1.82

2.19

2.02

2.19

2.26

Round the repartees to 3 decimal places.

Point Estimate

≤ μ ≤

The tolerance is +/ 0.005.

A bank director scantinesss to mention the completionity of the balance entirety monthly deposits per customer at the bank. He venerates an judge of this balance completionity using a dependence determination is adapted. How ample a specimen should he receive to be delayin $200 the objective balance delay 99% dependence? He assumes the gauge disconnection of entirety monthly deposits for all customers is encircling $1,000.

Round your repartee up to the right integer.

Sample .

The tolerance is +/ 1.

Suppose you accept been forthcoming a feature airline supply for sundry years. You are ardent in determining the balance daily figure of this supply in a 10year determination and you accept appropinquation to the supply reports for these years. However, you do not scantiness to balance all the daily figures aggravate 10 years owing there are irrelative thousand grounds aims, so you flow to receive a chance specimen of the daily figures and judge the balance. You scantiness to be 90% certain of your results, you scantiness the judge to be delayin $3.00 of the gentleman balance, and you venerate the gauge disconnection of the figure of this supply is encircling $12.75 aggravate this determination of spell. How ample a specimen should you receive?

Sample magnitude =

A social adornment salon security scantinesss to judge the figure of spells per year a dame has her hair produced at a adornment salon if she uses one at moderationest uninterruptedly a year. The security’s inquiryer judges that, of those women who use a adornment salon at moderationest uninterruptedly a year, the gauge disconnection of figure of spells of experience is closely 6. The social security scantinesss the judge to be delayin one spell of the objective medium treasure. How ample a specimen should the inquiryer receive to earn a 98% dependence plane?

Round your repartee up to the right integer.

Sample .

The tolerance is +/ 1.