Question

In a recent survey conducted by a professor of UM, 200 students were asked whether or not they have a satisfying experience with the e-learning approach adopted by the school in the current semester. Among the 200 students interviewed, 121 said they have a satisfying experience. What is the 99% confidence interval for the proportion of all UM students who have a satisfying experience with the e-learning approach?

Select one:

A. 0.537 to 0.673

B. 0.524 to 0.686

C. 0.548 to 0.662

D. 0.516 to 0.694

A manager wants to know whether customers in Taiwan, on average, would spend more than $2,000 per month on the service that is similar to what her company provides. The following information regarding the consumer behavior of 49 customers was provided by the marketing research team: sample mean = $2,400 and sample standard deviation = $1,800. Using the sample information provided and 0.05 significance level, determine the critical value and calculate the value of the test statistic.

Select one:

A. Critical value = +1.96, and Test statistic = +1.56

B. Critical value = +1.645, and Test statistic = +1.56

C. Critical value = –1.645, and Test statistic = –1.56

D. Critical value = –1.96 & +1.96, and Test statistic = –1.56

Answer 1