The population standard deviation for the body weights of the employees of a company is 10 pounds. If we want to be 95% confident that the sample mean is within 3 pounds of the true population mean,...

The population standard deviation for the body weights of the employees of a company is 10 pounds. If we want to be 95% confident that the sample mean is within 3 pounds of the true population mean, what is the minimum sample size that should be taken?

Use the table above for the z-score, and be sure to round up to the nearest integer.