A community health plan wishes to estimate the mean number of visits per plan participant in a year. How large a random sample of participants' records should be selected in order to estimate u to...

Extracted text: A community health plan wishes to estimate the mean number of visits per plan participant in a year. How large a random sample of participants' records should be selected in order to estimate u to within 2 visits with 95 % confidence? A similar study suggests that the standard deviation of the number of visits per person is approximately 6.3 .