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?
a.55.89%058.11%
b.56.45%057.55%
c.56.54%057.46%
d.56.07%057.93%
e.55.34%058.68%
The correct answer for the question that is being presented above is this one: "b.56.45%057.55%." 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.
