means, but my friend think…

I think this question should use t-Test: paired two sample for

means, but my friend think it should use t-test: t-test: Two-sample

assuming equal variances. So, I need someone to help me explain

which method is correct and answer the following question.

Thanks!!

A professor in the School of Business wants to investigate the

prices of new textbooks in the campus bookstore and the Internet.

The professor randomly chooses the required texts for 12 business

school courses and compares the prices in the two stores. The

results are as follows:

Book

Campus Store

Internet Price

1

$55.00

$50.95

2

47.50

45.75

3

50.50

50.95

4

38.95

38.50

5

58.70

56.25

6

49.90

45.95

7

39.95

40.25

8

41.50

39.95

9

42.25

43.00

10

44.95

42.25

11

45.95

44.00

12

56.95

55.60

At the .01 level of significance, is there any evidence of a

difference in the average price of business textbooks between the

campus store and the Internet? Use Excel and the classical

method.

Hyps: H0:

H1:

Test(s):

Decision rule:

Analysis:

Conclusions: (1)

(2)

(3)

(4)

What assumptions are necessary to perform this test?

Find the p-value in (a)? Using the p-value, Is there

any evidence of a difference in the average price of business

textbooks between the campus store and the Internet? Use Excel and

the p-value method and alpha = 1%.

Hyps: H0:

H1:

Test(s):

Analysis:

p-value:

Conclusions: (1)

(2)

(3)

(4)

The price is based on these factors:

Academic level

Number of pages

Urgency

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