A researcher has compiled a file of information on a random sample of 317 families that have chronic, long-term patterns of child abuse.
Reported here are some of the characteristics of the sample, along with values for the city as a whole. For each trait, test the null hypothesis of "no difference" and summarize your findings.

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Variable Sample a. Mothers' educational level (proportion b Family size (proportion of families with c. Mothers' work status (proportion of d. Relations with kin (proportion of fami- completing high school) four or more children) mothers with jobs outside the home) P 0.65 P 0.21 P 0.51 P0.82 0.61 P 0.26 Ps 027 P 0.43 lies that have contact with kin at least once a week) Fathers' educational achievement (average years of formal schooling) Fathers' occupational stability (average years in present job) e. 12.3 12.5 X- 3.7 s 0.5 f. 5.2