Question
An education researcher would like to test whether 2 nd graders retain or lose knowledge during the summer when they are presumably not in school.
An education researcher would like to test whether 2ndgraders retain or lose knowledge during the summer when they are presumably not in school. She asks nine 2ndgraders to take a comprehension exam at the end of the school year (May), and then asks those same students to come back after the summer (late August) to retake a different but equivalent exam, to see if their level of comprehension has changed. Using the data below, test this hypothesis using an alpha level of .05.
May: 95, 72, 78, 50, 89, 92, 75, 90, 65
August: 100, 80, 95, 65, 85, 98, 70, 96, 87
What is the appropriate test?
State the Null Hypothesis:
State the Alternative Hypothesis:
What is (are)the critical value(s)?
Calculate the obtained statistic:
Make a Decision:
Reject Null
Retain Null
What does your decision mean?
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