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Samples of quiz scores for two stats classes with different instructors provide the following results: Instructor...

Samples of quiz scores for two stats classes with different instructors provide the following results:

Instructor A

Mean: 78 Standard deviation: 10 Sample Size: 50

Instructor B

Mean: 72 Standard Deviation: 8 Sample Size: 40

does the evidence suggest that average in Instructor A's class is higher than average in Instructor B's class? Test Allpha=.05. Construct a 95 percent confidence interval for the differences in averages.

Math   Statistics-And-Probability   
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