Construct a 90% Confidence Interval for the Population Mean, μ

question 12

Multiple Choice

Construct a 90% confidence interval for the population mean, μ. Assume the population has a normaldistribution. A sample of 15 randomly selected math majors has a grade point average of 2.86 with a standarddeviation of 0.78. Round to the nearest hundredth.

• A) (2.51, 3.21)
• B) (2.41, 3.42)
• C) (2.37, 3.56)
• D) (2.28, 3.66)