Regression Estimates for Percentiles Suppose IQ scores of husbands and wives fol

Question

Regression Estimates for Percentiles Suppose IQ scores of husbands and wives follow the normal curve, but have different correlations in different populations. (In some populations, people of similar intelligence tend to marry and in others people of opposite intelligence tend to marry.) In each line of the table below, you're given the IQ percentile of one spouse and the correlation coefficient for from that population. Fill in the blanks to give the regression estimate for the IQ percentile of the other spouse.

Explanation / Answer

Husband's IQ percentile = 0.84

Using excel command ' =normsinv(0.84 ) '

We got z = 0.99 by rounding it will be 1.

Wife's IQ percenntile = 0.14

Using excel command ' =normsinv(0.14)'

We got z = -1.08 by rounding it will be -1.1.

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