A school administrator is concerned about the amount of credit card d

A school administrator is concerned about the amount of credit card debt college students have. She wishes to conduct a poll in order to estimate the percentage of full-time college students who have credit card debt of $2500 or more. She wishes the estimate to be within 2.5 percentage points with 95% confidence. She has a prior estimate from last year of 17%. What sample size will ensure this? Explain your method and calculations.

A school administrator is concerned about the amount of credit card d

A school administrator is concerned about the amount of credit card debt college students have. She wishes to conduct a poll in order to estimate the percentage of full-time college students who have credit card debt of $2500 or more. She wishes the estimate to be within 2.5 percentage points with 95% confidence. She has a prior estimate from last year of 17%. What sample size will ensure this? Explain your method and calculations.