A company wants to determine whether its consumer product ratings (0 10) have ch

Question

A company wants to determine whether its consumer product ratings (0 10) have changed from last year to this year. The table below shows the company's product ratings from eight consumers for last year and this year. At = 0.05, is there enough evidence to conclude that the ratings have changed? Assume the samples are random and dependent, and the population is normally distributed 3 4 5 7 Consumer Rating (last year)58 65 6 557 Rating (this year) 87 87954 10 Identify the claim and state Ho and Ha The claim is "The product ratings have Let d be the hypothesized mean of the ratings last year minus the ratings this year. State Ho and Ha. Choose the correct answer below | from last year to this year." Calculate d and sd (Type an integer or a decimal.) Calculate sd (Type an integer or a decimal. Round to three decimal places as needed.) Use the t-test to find the standardized test statistic t. (Type an integer or a decimal. Round to three decimal places as needed.) Decide whether to reject or fail to reject the null hypothesis. Choose the correct answer below O Fail to reject the null hypothesis 0 Reject the null hypothesis

Explanation / Answer

the claim is the product rating is changed from last year to this year.

for hypothesis: option D is correct

dbar= -1.375

sd =1.768

test statistic =1.926

fail to reject the null hypothesis (as p value is greater then 0.05 level)

conclusion: option B is correct: at the 5% level; there is not enough evidence to support the claim ........

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