Question

The mean percentage of a population of people eating out at least once a week is 57%, with a standard deviation of 3.5%. Assume that a sample size of 40 people was surveyed from the population an infinite number of times. In which interval will 95% of the sample means occur? 55.89% – 58.11% 56.45% – 57.55% 56.54% – 57.46% 56.07% – 57.93% 55.34% – 58.669%