In the past, it was reported that 66% of all Australians who…
In the past, it was reported that 66% of all Australians who live to be 70 years old get some form of skin cancer. A researcher would like to know if this percentage has increased. They will construct a 99% confidence interval. What sample size is needed to have a margin of error 0.05 if they use the estimate (p-hat) =0.66?