*Instructions: In testing situations, carry out a two-tailed test and use a p-value threshold of 5% unless explicitly directed otherwise.

The customer support team for a large internet retailer selects customers at random from among all those who have used customer support in the last month to survey regarding their satisfaction the interaction they had. Suppose they randomly select 120 customers out of the approximately 5,000 who have received support, and of these, 84 say they were satisfied.

A) Skim through the rest of the problem, then circle the correct answers below.

The box we need for this problem has... 0's and 1's OR other values

The SD of the population in this problem is... known OR estimated

B) Make your box and calculate the SD. SD of box = ___________

C)The percentage of all customers using customer support in the last month whowere satisfied is estimated to be about ________%, and this estimate is likely to beoffby about ________% or so.

D) A 95% confidence interval for the percentage of all customers using customersupport in the last month who were satisfied goes from ________% to ________%.