Estimate the average score at age thirty five

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Reference no: EM13133200

In a study of the stability of IQ scores, a large group of individuals is tested once at age 18 and again at age 35. The following results are obtained.

age18: average score 100 SD=15
age 35: average score 100 SD 15 r=0.80

a) estimate the average score at age 35 for all the individuals who scored 115 at age 18.
b) predict the score at age 35 for an individual who scored 115 at age 18.

Reference no: EM13133200

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