Essay about Exercise 11 and 16
July 20, 2014
Exercise 11 – Using Statistics to Describe a Study Sample
1. What demographic variables were measured at least at the interval level of measurement? Demographic variables that are measured at the interval level are age, income ($), length of labor (hrs), return to work (wks), number of hours working per week.
2. What statistics were used to describe the length of labor in this study? Were these appropriate? The statistics used to describe the length of labor in this study descriptive, they were mean and standard deviation. These are appropriate as they both can be calculated at the interval level of measurement.
3. What other statistic could have been used to …show more content…
8. Can the findings from this study be generalized to Black women? Provide rationale for your answer. No the study findings cannot be generalized to Black women. The experimental group only had one woman which accounted for 4% of the sample group and the control group had no Black women. That one Black woman accounted for 1.47% of the population for the entire study.
9. If there were 32 subjects in the experimental group and 36 subjects in the control group, why is the income data only reported for 30 subjects in the experimental group and 34 subjects in the control group? Based on the “Note” at the bottom of Table 1, Numbers do not always total 32 for the experimental group or 36 for control group because of missing data.
10. Was the sample for this study adequately described? Provide rationale for your answer. Yes, the sample for this study was adequately described. The study described the type of mothers involved (first time mothers), how they were selected and placed in either the experimental or control groups. The researchers also stated that it was a quasiexperimental study

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