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: H₀: μ = 8 versus Hα: μ ≠ 8 where μ = the true mean satisfaction rating for all customers of this store at α = 0.01?
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.