For Exercises 43–46, software output from a confidence interval for is provided. For each, examine the indicated software output, and do the following:

  1. Report the confidence interval in the form “(lower bound, upper bound).”
  2. Interpret the confidence interval.
  3. Calculate the margin of error for the confidence interval.
  4. Interpret the margin of error.

Question 8.45

45. Minitab output, where represents the population mean GPA of college freshmen.

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8.1.45

(a) (2.6807, 2.8193) (b) We are 95% confident that the population mean lies between 2.6807 and 2.8193. (c) 0.0693 (d) We can estimate the population mean to within 0.0693 with 95% confidence.