95 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. 49 students were randomly assigned to an intervention to address their struggles while the rest received no intervention. The mean score on an assessment taken after the intervention for those in the intervention group was 83.1 points with a standard deviation of 5.2 points while the mean score on the same assessment for those not receiving the intervention was 79.2 points with a standard deviation of 8.2 points. Let l1 = the true mean score for all students like these receiving the intervention and l2 =the true mean score for all students like these not receiving the intervention. What is the standardized test statistic and P-value for conducting a significance test of l1 – H2? You may assume the conditions have been met. Ot = 2. 75, and P-value = 0. 9963 Ot = -2. 75, and P-value = 0. 9963 O None of these are correct. Ot = 2. 75, P-value = 0. 0037 Ot= -2. 75, P-value = 0. 0037 |

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95 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. 49 students were randomly assigned to an intervention to address
their struggles while the rest received no intervention. The mean score on an
assessment taken after the intervention for those in the intervention group was 83.1
points with a standard deviation of 5.2 points while the mean score on the same
assessment for those not receiving the intervention was 79.2 points with a standard
deviation of 8.2 points. Let l1 = the true mean score for all students like these
receiving the intervention and l2 =the true mean score for all students like these
not receiving the intervention.
What is the standardized test statistic and P-value for conducting a significance test
of l1 – H2? You may assume the conditions have been met.
Ot = 2.75, and P-value = 0. 9963
Ot = -2. 75, and P-value = 0. 9963
None of these are correct.
Ot = 2. 75, P-value = 0. 0037
Ot = -2. 75, P-value = 0. 0037
Transcribed Image Text:95 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. 49 students were randomly assigned to an intervention to address their struggles while the rest received no intervention. The mean score on an assessment taken after the intervention for those in the intervention group was 83.1 points with a standard deviation of 5.2 points while the mean score on the same assessment for those not receiving the intervention was 79.2 points with a standard deviation of 8.2 points. Let l1 = the true mean score for all students like these receiving the intervention and l2 =the true mean score for all students like these not receiving the intervention. What is the standardized test statistic and P-value for conducting a significance test of l1 – H2? You may assume the conditions have been met. Ot = 2.75, and P-value = 0. 9963 Ot = -2. 75, and P-value = 0. 9963 None of these are correct. Ot = 2. 75, P-value = 0. 0037 Ot = -2. 75, P-value = 0. 0037
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