AnswersProbability and Statistics with Applications Honors Sem-2-FL-1210300 2024-2025Cumulative Exam — Cumulative examQuestion 27
27
QuizMultiple Choice
Cumulative Exam — Cumulative exam
Question 27 • Probability and Statistics with Applications Honors Sem-2-FL-1210300 (2024-2025)
A study is done to estimate the true mean satisfaction rating for all customers of a particular retail store. A random sample of 200 customers is selected and a 99% confidence interval for the true mean satisfaction rating is 7.8 to 8.4 where 1 represents very dissatisfied and 10 represents completely satisfied. Based upon this interval, what conclusion should be made about the hypotheses: = 8 versus 8 where μ = the true mean satisfaction rating for all customers of this store at α = 0.01?
Answer
A
Reject H0. There is convincing evidence that the true mean satisfaction rating of all customers in this store equals 8.B
Reject H0. There is convincing evidence that the true mean satisfaction rating of all customers in this store differs from 8.C
Fail to reject H0. There is not convincing evidence that the true mean satisfaction rating of all customers in this store equals 8.D
Fail to reject H0. There is not convincing evidence that the true mean satisfaction rating of all customers in this store differs from 8.