confidence interval

UB ForumCategory: Statisticsconfidence interval
Debbie HarryDebbie Harry Staff asked 5 years ago

The grade point averages for 10 randomly selected junior college students are listed below. Assume the grade point averages are normally distributed. Find a 98% confidence interval for the true mean.

2.0 3.2 1.8 2.9 0.9 4.0 3.3 2.9 3.6 0.8

A) (2.12, 3.14)

B) (0.67, 1.81)

C) (3.11, 4.35)

D) (1.55, 3.53)

1 Answers
Best Answer
Selena TateSelena Tate Staff answered 5 years ago

The grade point averages for 10 randomly selected junior college students are listed below. Assume the grade point averages are normally distributed. Find a 98% confidence interval for the true mean.
2.0 3.2 1.8 2.9 0.9 4.0 3.3 2.9 3.6 0.8
Solution: (1.55, 3.53)