Biomedical Statistics: Independent Project on Urban Low Income Women Affected by Changes to Social Policies

2267 Words Jun 12th, 2013 10 Pages
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Independent Project

Background of the study:
The data in the dataset comes from a longitudinal study of low-income women in four urban communities. In the original study, extensive information was collected in 1999 (Wave 1) and 2001 (Wave 2) from about 4,000 women. A major purpose of the study was to understand the life trajectories of these women and their children during a period of major changes to social policies affecting poor people in the United States. The sample was randomly selected from women who, in 1995, were single mothers receiving cash welfare assistance in the four cities. All data were collected by means of 90-minute in-person interviews in either English or Spanish in the study participants’
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In comparison, 12.7% of women are Hispanic at a frequency of 123, while 5.6% are White (not Hispanic) at a frequency of 54, and 1.4% consider themselves other and do not belong to any of the three groups at a frequency of 14.
The frequency distribution table and bar graph shown above reveal an overwhelming percentage of women are Black (not Hispanic), meaning that the sample is not normally distributed among Racial or Ethnic groups. The data is positively skewed with a highly disproportionate number of this sample of low income urban single mothers classified as Black WHEN YOU USE A NOMINAL VARIABLE, YOU REALLY CANNOT INTERPRET SKEWNESS AS IS DEPENDS ON HOW YOU ORDER VARIABLES.
Mental Health
2. Descriptive of the continuous variable Mental Health
Table 3 Summary statistic of Mental Health
Column | n | Mean | Std. Dev. | Median | Skewness | Kurtosis |
Mental Health | 876 | 46.881104 | 10.791316 | 48.7265 | -0.58058256 | -0.23109955 |

Table 4 Frequency table results for Mental Health:
Mental Health | Frequency | Relative Frequency |
60.758 | 17 | 0.019406393 |
57.827 | 13 | 0.014840183 |
55.868 | 8 | 0.00913242 |
57.923 | 8 | 0.00913242 |
57.888 | 7 | 0.007990868 |

WHAT IS THIS ABOVE ?
The variable of analysis in this section is the measurement of mental health scores in the data set of low income women. The table 3 summary statistic shows that out of a sample size of 876 women, the mean mental health score is…