Question: #28. A public health unit wants to sample death records for the past year in New York City to estimate the proportion of the deaths that were caused by accidents. They want the estimate to be accurate within 0.02 with a confidence level of 95%.

(a) Find the necessary sample size if based on previous studies they believe that this proportion doesn’t exceed 0.10

(b) Suppose that in determining the necessary sample size they use the safe approach that sets \(\pi =0.5\), what is the sample size?