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A study sampled 7 courses at HSU. The following table lists the prices of the textbooks...

A study sampled 7 courses at HSU. The following table lists the prices of the textbooks

for those courses at the HSU bookstore and Amazon. We want to determine if on

average the HSU bookstore is more expensive than Amazon.

Book HSU Amazon

Book HSU Amazon
1 100 94
2 120 116
3 150 125
4 77 90
5 115 108
6 28 35
7 150 130

a. Write the null and alternative hypothesis for this question

c. Find the mean of the difference in prices.

d. Find the standard deviation of the difference in prices.

e. Find the t-score for the mean difference in prices.

f. Find the p-value from that t-score.

g. What is your conclusion?

Math   Statistics-And-Probability   
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