A college professor claims that the entering class this year appears to be smarter than entering...

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A college professor claims that the entering class this year appears to be smarter than entering classes from previous years.

math Statistics-And-Probability

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Answer 1

Answer #1

Below are the null and alternative Hypothesis,
Null Hypothesis, H0: μ = 112
Alternative Hypothesis, Ha: μ > 112

Test statistic,
t = (xbar - mu)/(s/sqrt(n))
t = (119 - 112)/(11/sqrt(13))
t = 2.294

P-value Approach
P-value = 0.020

As P-value < 0.05, reject the null hypothesis.
Yes

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Answer 2

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