Scott wants to find a 95% confidence interval for the average GPA for Allegany College of Maryland students. He gets the records for 89 student. The r

alesterp 2021-01-15 Answered
Scott wants to find a 95% confidence interval for the average GPA for Allegany College of Maryland students. He gets the records for 89 student. The results were roughly bell-shaped with a mean of 2.3 and standard deviation of 0.7. Construct a 95% confidence interval in the form: Estimate ± margin of error.
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Expert Answer

Demi-Leigh Barrera
Answered 2021-01-16 Author has 97 answers
Step 1
Confidence interval are of utmost importance in statistics. It forms an integral part of hypothesis testing.
Step 2
The estimate is the mean =2.4
The margin of error is σnτ0.025=0.789(1.96)=0.4986
n is the sample size, σ is the standard deviation.
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