**IBM SPSS 21 needed**

Example

- In two separate studies, the actual difference between the means of a treated group and an untreated group is 3 points. However, in one study, the σ
_{M1-M2}is very large and so the 3 points is not found to be significant. In the other study, the σ_{M1-M2}is very small and so the 3 points is found to be significant. What might have caused this big difference in the σ_{M1-M2}for the two studies? - In a study of the effect of a new drug on the alleviation of asthma symptoms, the σ
for symptom relief in the patient group that received the new drug is 1.45, and the σ_{M}for symptom relief in the group that did not receive the new drug is 1.22. Calculate the σ_{M}_{M1-M2}. - Manually enter the 18 scores from the depression example in Module 20 into the SPSS
**Data View**spreadsheet. Data entry for a*t*test with equal sample sizes is not intuitively obvious. In the textbook, the data are set up as two groups of 9 clients. In SPSS, all 18 scores (9 + 9) are entered in a single column. Then their group membership (medication vs. counseling) is entered in the second column. Thus, enter the data as follows:

Subject | Mathematics |

Due By (Pacific Time) | 02/18/2014 06:00 pm |

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