You intend to estimate a population mean μμ with the following sample. 91.4 75.3 92.4 94.6 67 81.5 84.9 66 HINT: Use the One Quantitative calculator to find the Mean and Standard Deviation of the...

You intend to estimate a population mean μμ with the following sample.

HINT: Use the One Quantitative calculator to find the Mean and Standard Deviation of the sample


You believe the population is normally distributed. Find the 80% confidence interval. Enter your answer as anopen-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.