A random sample of n = 16 men between 30 and 39 years old is asked to do as many sit-ups as they can in one minute. The mean number is x = 26.2, and the standard deviation is s = 12. (a) Find the value of the standard error of the sample mean. (b) Find a 95% confidence interval for the population mean. (Round all answers to the nearest tenth.) to sit-ups

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