Stats I, Item # Q-02
At the Joseph Biden Middle School in Down-the-Shore, Delaware,student reading comprehension was evaluated, both pre-test andpost-test, bookending a pilot program intervention advocated by thedistrict superintendent and board of education.
Pre-Test | 66 | 45 | 70 | 32 | 60 | 84 | 25 | 76 | 50 | 88 | 75 | 64 |
Post-Test | 80 | 54 | 78 | 28 | 76 | 76 | 50 | 72 | 75 | 90 | 75 | 56 |
The vice-principal optimistically expected that the interventionwould improve reading comprehension scores, whereas the principalpessimistically anticipated that the instrument confused studentsand scores dropped. Identify the mean average scores on thepre-test and post test instruments, and what the average change wasacross all participants reported in this sample. Test with 90%confidence that the claim that the intervention had an impact ofsome kind. State the hypotheses and the conclusions, bothtechnically and contextually. Confirm the findings with thecorresponding p-value and confidence interval.
