Answer:
a) (233.09,271.80)
b) Yes
Explanation:
We are given the following information:
Population mean = $215.60
Sample mean = $252.45
Sample standard deviation = $77.50.
n = 64
Formula:
Putting the values, we get,

b) The mean amount spent per day by families visiting Niagara Falls differs from the mean reported by the American Automobile Association because the confidence interval lies above $215.60