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A company wants to determine whether its consumer product ratings (0minus10) have changed from last year to this year. The table below shows the company's
A company wants to determine whether its consumer product ratings (0minus10) 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 alphaequals0.05, is there enough evidence to conclude that the ratings have changed? Assume the samples are random and dependent, and the population is normally distributed. Complete parts (a) through (f). Consumer Rating (last year) Rating (this year) 1 6 5 2 6 2 3 5 5 4 3 2 5 10 10 6 8 5 7 5 6 8 7 5 Identify the claim and state Upper H 0 and Upper H Subscript a. The claim is "The product ratings have changed not changed increased decreased from last year to this year." Part 2 Let mu Subscript d be the hypothesized mean of the ratings last year minus the ratings this year. State Upper H 0 and Upper H Subscript a. Choose the correct answer below. A. Upper H 0: mu Subscript dless than or equalsd overbar Upper H Subscript a: mu Subscript dgreater thand overbar B. Upper H 0: mu Subscript dnot equals0 Upper H Subscript a: mu Subscript dequals0 C. Upper H 0: mu Subscript dless than or equals0 Upper H Subscript a: mu Subscript dgreater than0 D. Upper H 0: mu Subscript dgreater than or equals0 Upper H Subscript a: mu Subscript dless than0 E. Upper H 0: mu Subscript dgreater than or equalsd overbar Upper H Subscript a: mu Subscript dless thand overbar F. Upper H 0: mu Subscript dequals0 Upper H Subscript a: mu Subscript dnot equals0
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