# math

Joan moves into her apartment and wants to purchase a new couch. She wants to determine if there is any difference between the average cost of couches at two different stores. Test the hypothesis that there is no difference at a=0.05
Store 1 Store 2
x(sample mean).........\$650... \$730
o(sample deviation).... \$61... \$78
n....................... 24.... 21

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1. Ho: u1-u2 = 0
Ha: u1-u2 is not 0
test-statistic = -3.8563
p-value = 0.00038
df = 43
Conclusion:Since p-value is less than alpha=5%, Reject Ho.
There is at difference in the average cost of couches at these two stores.

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posted by Kuai

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