The proportion of public accountants who have changed companieswithin the last three years is to be estimated within 4%. The 95%level of confidence is to be used. A study conducted several yearsago revealed that the percent of public accountants changingcompanies within three years was 22. (Use z Distribution Table.)(Round the z-values to 2 decimal places. Round up your answers tothe next whole number.)
a. To update this study, the files of how many publicaccountants should be studied?
b. How many public accountants should be contacted if noprevious estimates of the population proportion are available?
