A researcher surveys a group of working married women and reports the following results for the first four surveyed: M = 45 SD = 11.18 M = 82.5 SD = 10.9 r = ?.92
a. Give the Z score prediction formula for predicting proportion of housework done from proportion of income contributed.
b. Predict the contribution to housework for a woman who provides 90% of the income.
c. Explain what you have done to a person who is familiar with correlation but not with regression.
What will be an ideal response?
a. Predicted ZY = (?.92)(ZX).
b. ZX = (90 ??45)/11.18 = 4.03; predicted ZY (?.92)(4.03) = ?3.71
Predicted Y = 82.5 + (?3.71)(10.9) = 42.06%
c. Answers will vary
Person Rigidity Adjustment to job
Tested X ZX Y ZY
A 7 1.06 10 ?.61
B 4 ?1.34 21 1.41
C 6 .26 9 ?.80
Person
% Contribution to
Household Income
% Contribution to
Housework
Tested X ZX Y ZY
C1 60 1.34 70 ?1.15
F3 30 ?1.34 100 1.61
B8 40 ?.45 80 ?.23
J2 50 .45 80 ?.23
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