MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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In a survey that included assessment of husband-and-wife heights, Hodges, Krech, and Crutchfield (1975) reported the following results. Let’s treat wife height as the predictor (X) variable and husband height as the outcome (Y) variable:

rXY=.32

Wifeheight: MX=64.42, sX=2.56

Husbandheight: MY=70.46, sY=2.87

N=1,296

  1. Calculate the values of the b0 and b coefficients to predict husband height in inches (Y) from wife height in inches (X) and write out this raw-score predictive equation.
  2. For a woman who is 62 in. tall, what is the predicted height of her future husband (on the basis of your equation for part a)? If her husband’s actual height turns out to be 73 in., what can you say about the difference between predicted and actual height? Do some short women marry tall men?
  3. Would the equation to predict wife height from husband height be the same as your equation in part a? Why or why not?
  4. What proportion of variance in husband height is predictable from wife height? What proportion of variance in wife height is predictable from husband height?
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