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Here is the data set for quiz scores for the students who enroll the Economics 101....

Here is the data set for quiz scores for the students who enroll the Economics 101.

13 14 14 17 15 18 14 18 19 19 20 20 22 22 23 13 9 11 14 14 16

In last semester, the average score for the same quiz was 18.1. With 90% confidence, what conclusion can be reached about how the true current mean score compares to last year?

Math   Statistics-And-Probability   
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