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.

95% of the sample mean occurs between:
A. 55.89%
B. 56.07
C. 56.45
and
A. 57.55%
B. 57.93%
C. 58.11%.

Answer 1

@tkhunny

Answer 2

You've already seen it. It looked fine to me.

Answer 3

So are these the correct answers

Answer 4

or is it 56.45% – 57.55%

Answer 5

@pooja195

Answer 6

http://i.imgur.com/NdXZQl0.png

Answer 7

@Mehek14