Question

GSU's Rialto Center for the Performing Arts wanted to investigate why ticket sales for the upcoming season significantly decreased from last year’s sales. The marketing staff collected data from a survey of community residents. Out of the 110 people surveyed, only 7 received the concert brochure in the mail. Which of the following is a reason that the marketing staff should not calculate a confidence interval for the proportion of all community residents who received the concert brochure by mail? Check all that apply.

A-The sample needs to be random, but we don’t know if it is.

B-The actual count of community residents who received the concert brochure by mail is too small.

C-The actual count of students who community residents who didn’t receive the concert brochure by mail is too small.

D-n ^ p is not greater than 10.

E-n ( 1 − ^ p ) is not greater than 10.

Answer 1

Ans:

Correct options are A,B,D:

The sample needs to be random, but we don't know if it is.
-The actual count of community residents who received the concert brochure by mail is too small.
-np is not greater than 10.