Question

The high temperatures (in degrees Fahrenheit) of a random sample of 8 small towns are:

98.5

97.5

99.2

99.9

99.5

96.7

99.6

99.3

Assume high temperatures are normally distributed. Based on this data, find the 80% confidence interval of the mean high temperature of towns. Enter your answer as an open-interval (i.e., parentheses) accurate to two decimal places (because the sample data are reported accurate to one decimal place).

80% C.I. =

Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places.

Answer 1

Here we use the value of t statistics