Question

calculate Sd

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 Ata=005, 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 Consumer 1 2 3 4 5 6 7 8 Rating (last year) 5 8 3 5 9 6 7 7 Rating (this year) 453 394 74 - 1375 (type an integer or a decimal) Calculates (Type ang decal Round to the decimal places as eded)

Answer 1

Rating consumer Rating (this year) difference (last year) am si o r soos wa a - moroor om 1=1

mean td ) = 5* - - 1375 Sample Standard deviation (31) = Elkar)" nel = (1-1-375) #---3-1-3753 = 375 ={1-69642857 - 1.30947 a = 11.375 fins Sd = 1.302 Avg