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Week 5 Independent t Test Exercises Complete Solution

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  • Subjects: Math | Environmental Law |
  • Due on 08 Jul, 2018 08:12:38
  • Asked on 08 Jul, 2018 08:12:38
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Week 5 Independent t Test Exercises Complete Solution

Week 5 Independent t Test Exercises

Part I

The hypothesis being tested is: Women who are working will have a lower level of depression as compared to women who are not working. 

Using Polit2SetC SPSS dataset, which contains a number of mental health variables, determine if the above hypothesis is true.

Follow these steps when using SPSS:

1.       Open Polit2SetC dataset.

2.       Click Analyze then click Compare Means, then Independent Sample T-test.

3.       Move the Dependent Variable (CES_D Score “cesd”) in the area labelled Test Variable.

4.       Move the Independent Variable (Currently Employed “worknow”) into the area labelled Grouping Variable. The worknow variable is coded as (0= those women who do not work and 1= those women who are working).  Click on Define Groups in group 1 box type 0 and in group 2 box type 1. Click Continue.

5.       Click continue and then click OK.

Assignment: Through analysis of the data and use of the questions below write one to two paragraphs summarizing your findings from this t-test.

1.       How many women were employed versus not employed in the sample?

2.       What is the total sample size?

3.       What are the mean (SD) CES-D scores for each group?

4.       Interpret the Levene’s statistic. (Hint: Is the assumption of homogeneity of variance met? Are equal variances assumed or not assumed?)

5.       What is the value of the t-statistic, number of degrees of freedom and the p-value?

6.       Does the data support the hypothesis? Why or why not?

Part II

Hypothesis: Women who reported depression scores in wave 1 and wave 2 of the study did not have a significant difference in their level of depression. 

Using Polit2SetC SPSS dataset, determine if the above hypothesis is true.

Follow these steps when using SPSS:

1.       Open Polit2SetC dataset.

2.       Click Analyze then click Compare Means, then Paired Samples T-test.

3.       First click on CES-D Score (cesd) and move it into the box labelled Paired Variables (in the rectangle for Pair 1 of Variable 1 and then click on CESD Score, Wave 1 (cesdwav1) and move it into the Paired Variables box (in the rectangle next to CES-D Score, pair 1, variable 2).

4.       Click continue and then click OK.

 

Assignment: Through analysis of the data and use of the questions below write one to two paragraphs summarizing your findings from this t-test.

1.       What is the total sample size?

2.       What are the mean (SD) CES-D scores at wave 1 and wave 2?

3.       What is the mean difference between the two time periods?

4.       What is the value of the t-statistic, number of degrees of freedom and the p-value(sig)?

5.       Does the data support the hypothesis? Why or why not?

Part III

Using Polit2SetC dataset, run independent groups t-tests for three outcomes. The outcome variables are CES-D Score (cesd), SF12: Physical Health Component Score, standardized (sf12phys) and SF12: Mental Health Component Score, standardized (sf12ment).

Follow these steps when using SPSS:

1.       Open Polit2SetC dataset.

2.       Click Analyze then click Compare Means, then Independent Sample T-test.

3.       Move the Dependent Variables (CES_D Score “cesd”, SF12: Physical Health Component Score, standardized (sf12phys), and SF12: Mental Health Component Score, standardized (sf12ment) ) in the area labelled Test Variable.

4.       Move the Independent Variable (Educational Attainment “educatn”) into the area labelled Grouping Variable. The educatn variable is coded as (1= no high school credential and 2=diploma or GED).  Click on Define Groups in group 1 box type 1 and in group 2 box type 2. Click Continue.

5.       Click continue and then click OK.

Assignment: Create a table to present your results, use the table 6.3 in Chapter 6 as a model.  Write one or two paragraphs explaining your results.

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Week 5 Independent t Test Exercises Complete Solution

TutorMaster
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In this part we considered a sample of 960 women out of which 436 were employed and 524 were not. The mean(SD) for the employed group is 15.8239 (10.13655) and for unemployed group ...
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