Loose-leaf Version for The Basic Practice of Statistics 7e & LaunchPad (Twelve Month Access)
Loose-leaf Version for The Basic Practice of Statistics 7e & LaunchPad (Twelve Month Access)
7th Edition
ISBN: 9781319019334
Author: David S. Moore, William I. Notz, Michael A. Fligner
Publisher: W. H. Freeman
Question
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Chapter 5, Problem 5.20CYS
To determine

To find: The school GPA if one child in this class has IQ score 110.

Expert Solution & Answer
Check Mark

Answer to Problem 5.20CYS

The correct answer is option (b).

Explanation of Solution

Given info:

The given scatter plot shows the school HPA against IQ test scores for 15 seventh grade students.

Loose-leaf Version for The Basic Practice of Statistics 7e & LaunchPad (Twelve Month Access), Chapter 5, Problem 5.20CYS

Reason for correct answer:

Justification:

From the output, it is observed that the corresponding value on the School GPA in y axis to the value of 110 on the IQ test score in x-axis meets the regression line on 7.5.

Reason for incorrect answer:

Option (a): 2 are wrong because the calculated predicted value is 7.5.

Option (c): 11 are wrong because the calculated predicted value is 7.5.

Conclusion:

Hence, the predicted school GPA score is, 7.5.

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