Let µi =the true mean score for all students like these receiving the intervention and u2 = the true mean score for all students like these not receiving the intervention. Which of the following is correct for conducting a significance test of li – µ2? 1. Ho: µ1 – 12 < 0 II. Ha: µ1 – µ2 > 0 III. Both the Random and Normal/Large Counts conditions are met. Ol and III O1, II, and II I only Il and III

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43 students who struggle in math classes at a large university were selected to
participate in a study. The university is hoping that an intervention program will help
these students. To determine if the intervention improves assessment scores, 22
students were randomly assigned to an intervention to address their struggles while
the rest received no intervention. Boxplots of the sample data appear below:
70
75
80
Assessment Scores
Let li =the true mean score for all students like these receiving the intervention
and u2 = the true mean score for all students like these not receiving the
intervention.
Which of the following is correct for conducting a significance test of l1 – µ2?
1. Ho: µ1 – µ2 < 0
II. Ha: H1 – µ2> 0
II. Both the Random and Normal/Large Counts conditions are met.
OI and III
O1, II, and III
O I only
O Il and II
No Intervention
Intervention
Transcribed Image Text:43 students who struggle in math classes at a large university were selected to participate in a study. The university is hoping that an intervention program will help these students. To determine if the intervention improves assessment scores, 22 students were randomly assigned to an intervention to address their struggles while the rest received no intervention. Boxplots of the sample data appear below: 70 75 80 Assessment Scores Let li =the true mean score for all students like these receiving the intervention and u2 = the true mean score for all students like these not receiving the intervention. Which of the following is correct for conducting a significance test of l1 – µ2? 1. Ho: µ1 – µ2 < 0 II. Ha: H1 – µ2> 0 II. Both the Random and Normal/Large Counts conditions are met. OI and III O1, II, and III O I only O Il and II No Intervention Intervention
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