In: Statistics and Probability
You must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures: 78.1 70.7 73.8 80.1 63.1 66.8 69 78.1 66.4 76.5 70.7 68.5 Find the 99% confidence interval. Enter your answer as an open-interval (i.e., parentheses) accurate to two decimal places. Use (lower, upper) formats. 99% C.I. =
We have for given data,
Sample mean =71.82
Sample standard deviation =5.439
Sample size =12
Level of significance=1-0.99=0.01
Degree of freedom =11
t critical value is (by using t table)=
3.106