There are two Chevrolet dealers in Jamestown, New York. The mean monthly sales at Sharkey Chevy and Dave White Chevrolet are about the same. However, Tom Sharkey, the owner of Sharkey Chevy, believes his sales are more consistent. Below are the numbers of new cars sold at Sharkey in the last 7 months and for the last 8 months at Dave White. Do you agree with Mr. Sharkey? Use the 0.01 significance level. Sharkey 98 78 54 57 68 64 70 Dave White 75 81 81 30 82 46 58 101 Click here for the Excel Data File Set up the null hypothesis and the alternate hypothesis. Null hypothesis A. H0:σ2w≥σ2sH0:σw2≥σs2 B. H0:σ2w≤σ2sH0:σw2≤σs2 Choice A Choice B Alternate hypothesis A. H1:σ2w<σ2sH1:σw2<σs2 B. H1:σ2w>σ2sH1:σw2>σs2 Choice A Choice B Calculate the standard deviation. (Round your answers to 2 decimal places.) State the decision rule for 0.01 significance level. (Round your answer to 2 decimal places.) What is the value of F? (Round your answer to 2 decimal places.) For the value of F calculated above, choose the decision regarding the null hypothesis. Do not Reject H0 Reject H0 There is more variation of the monthly sales. True False

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Description: There are two Chevrolet dealers in Jamestown, New York. The mean monthly sales at Sharkey Chevy and Dave White Chevrolet are about the same. However, Tom Sharkey, the owner of Sharkey Chevy, believes his sales are more consistent. Below are the numbe

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There are two Chevrolet dealers in Jamestown, New York. The mean monthly sales at Sharkey Chevy and Dave White Chevrolet are about the same. However, Tom Sharkey, the owner of Sharkey Chevy, believes his sales are more consistent. Below are the numbers of new cars sold at Sharkey in the last 7 months and for the last 8 months at Dave White. Do you agree with Mr. Sharkey? Use the 0.01 significance level.


Sharkey	98	78	54	57	68	64	70
Dave White	75	81	81	30	82	46	58	101

Click here for the Excel Data File

Set up the null hypothesis and the alternate hypothesis.

Null hypothesis

A. H0:σ2w≥σ2sH0:σw2≥σs2
B. H0:σ2w≤σ2sH0:σw2≤σs2

Choice A
Choice B

Alternate hypothesis

A. H1:σ2w<σ2sH1:σw2<σs2
B. H1:σ2w>σ2sH1:σw2>σs2

Choice A
Choice B

Calculate the standard deviation. (Round your answers to 2 decimal places.)

State the decision rule for 0.01 significance level. (Round your answer to 2 decimal places.)

What is the value of F? (Round your answer to 2 decimal places.)

For the value of F calculated above, choose the decision regarding the null hypothesis.

Do not Reject H₀
Reject H₀

There is more variation of the monthly sales.

True
False

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