SOC/SW A researcher has compiled a fi le of information on a random sample of 317 families

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SOC/SW A researcher has compiled a fi le of information on a random sample of 317 families in a city that has chronic, long-term patterns of child abuse. Below are reported 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 fi ndings.

a. Mothers’ educational level (proportion completing high school):

City Sample Pu = 0.63 Ps = 0.61

b. Family size (proportion of families with four or more children):

City Sample Pu = 0.21 Ps = 0.26

c. Mothers’ work status (proportion of mothers with jobs outside the home):

City Sample Pu = 0.51 Ps = 0.27

d. Relations with kin (proportion of families that have contact with kin at least once a week):

City Sample Pu = 0.82 Ps = 0.43

e. Fathers’ educational achievement (average years of formal schooling):

City Sample

µ = 12.3 X — = 12.5 s = 1.7

f. Fathers’ occupational stability (average years in present job):

City Sample

µ = 5.2 X — = 3.7 s = 0.5

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