A nutritionist wishes to estimate the mean weight of 16-year-old adolescents. She wants to keep the margin of error within 0.04 kilograms. Find the appropriate sample size she needs at 95% confidence...

A nutritionist wishes to estimate the mean weight of 16-year-old adolescents. She wants to keep the margin of error within 0.04 kilograms. Find the appropriate sample size she needs at 95% confidence level if the population standard deviation is 0.17 kilograms.