Question

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3. Suppose men always married women who were exactly 8% shorter. What would the correlation between their heights be? 4. Is the correlation between the heights of husbands and wives in the U.S. around -0.9,-0.3, 0.3, or 0.9? Explain briefly. 5. Three data sets are collected, and the correlation coefficient is computed in each case. The variables are (i) grade point average in freshman year and in sophomore year (ii) grade point average in freshman year and in senior year (iii) length and weight of two-by-four boards Possible values for correlation coefficients are -0.50 0.0 0.30 0.60 0.95 Match the correlations with the data sets; two will be left over. Explain your choices.

Answer 1

sola 3 The All correlation would be 1 data would lie on a line. height of woman= 0.92x height of man. ii) Length and weight of 2x4 board = 0.95 since bourds would have less variability. :.0.95 can be correlation for (11) In freshman and sophomore years grade Point average would be more than Preshmen and senior years grade Point average of long time span.