Mathematics, 27.02.2021 22:20 Tenika1
Statistics students believe that the mean score on a first statistics test is 65. The instructor thinks that the mean score is higher. She samples 10 statistics students and obtains the scores:
Grades 63.9 68.4 96 85.5 96 62.7 83.2 88 73.5 65
Test grades are believed to be normally distributed.
Use a significance level of 5%.
State the alternative hypothesis:
H
A
:
μ
>
65
μ
≠
65
μ
<
65
State the mean of the sample:
State the standard error of the sample means:
State the test statistic:
t
=
State the p-value:
Decision:
Fail to reject the null hypothesis.
Reject the null hypothesis.
Answers: 3
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Statistics students believe that the mean score on a first statistics test is 65. The instructor thi...
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