68.7468.74

79.3879.38

70.9470.94

84.7184.71

79.7479.74

85.7485.74

100.91100.91

98.0298.02


a.
The point estimate of the population mean is the sample mean.
The sample mean (point estimate of the population mean travel tax) is calculated as follows:
b.
The sample standard deviation is calculated as follows:
Sample mean = 83.52.
Sample standard deviation, s is 11.51.
The sample size, n is 8.
From the EXCEL, using the formula, =T.INV.2T (...
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