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. age 18: average score 100, SD 15 age 35: average score 100, SD 15, r≈ 0.8 The scatter diagram is football-shaped. a. Estimate the average score at age 35 for all the individuals who scored 115 at age 18. Answer: b. Predict the score at age 35 for an individual who scored 115 at age 18. Answer:

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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.
age 18: average score
100, SD 15
age 35: average score
100, SD
The scatter diagram is football-shaped.
a. Estimate the average score at age 35 for all the individuals who scored 115 at age 18.
Answer:
15, r≈ 0.8
b. Predict the score at age 35 for an individual who scored 115 at age 18.
Answer:
Transcribed Image Text: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. age 18: average score 100, SD 15 age 35: average score 100, SD The scatter diagram is football-shaped. a. Estimate the average score at age 35 for all the individuals who scored 115 at age 18. Answer: 15, r≈ 0.8 b. Predict the score at age 35 for an individual who scored 115 at age 18. Answer:
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