A professor wants to determine if the time of day that a class is held has any impact on exam scores, so he looks at the average final exam score of his two classes. His morning class of 124 students has a mean final exam score of 86.2% while his afternoon class of 141 students has a mean score of 83.9%. The difference in the means is found to be statistically significant at the 0.05 level. Determine the meaning of this significance level. Select the correct answer below: We can expect that any 141 students in the professor's afternoon class will have a mean final exam score of 83.9%. At the 0.05 level of significance, the time of the professor's class is associated with final exam score. The afternoon class will always have a lower mean final exam score. O At the 0.05 level of significance, the time of the professor's class determines final exam score.

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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A professor wants to determine if the time of day that a class is held has any impact on exam scores, so he looks at the
average final exam score of his two classes. His morning class of 124 students has a mean final exam score of 86.2% while
his afternoon class of 141 students has a mean score of 83.9%. The difference in the means is found to be statistically
significant at the 0.05 level. Determine the meaning of this significance level.
Select the correct answer below:
We can expect that any 141 students in the professor's afternoon class will have a mean final exam score of
83.9%.
At the 0.05 level of significance, the time of the professor's class is associated with final exam score.
The afternoon class will always have a lower mean final exam score.
O At the 0.05 level of significance, the time of the professor's class determines final exam score.
Transcribed Image Text:A professor wants to determine if the time of day that a class is held has any impact on exam scores, so he looks at the average final exam score of his two classes. His morning class of 124 students has a mean final exam score of 86.2% while his afternoon class of 141 students has a mean score of 83.9%. The difference in the means is found to be statistically significant at the 0.05 level. Determine the meaning of this significance level. Select the correct answer below: We can expect that any 141 students in the professor's afternoon class will have a mean final exam score of 83.9%. At the 0.05 level of significance, the time of the professor's class is associated with final exam score. The afternoon class will always have a lower mean final exam score. O At the 0.05 level of significance, the time of the professor's class determines final exam score.
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