Question: A researcher was interested in the correlation between the number of seconds

it takes to solve a mathematics problem (X) and scores on a test of memory (Y). He tested 60 children and found the following:

X Y

Mean 22.3 56.5

Standard deviation 5.6 8.7

Sum of Cross-Products of Deviation Scores= -1667.34

1. Compute r and interpret it.
2. Develop the regression equation for predicting Y from X.
3. Compute the standard error of estimate. Consider n to be large.

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