Answered: 120 100 80 800 850 900 950 Brain Size…

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter2: Equations And Inequalities

Section2.4: Complex Numbers

Problem 51E

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Question

Brain size Does your IQ depend on the size of your
brain? A group of female college students took a test that
measured their verbal IQs and also underwent an MRI

scan to measure the size of their brains (in 1000s of pix-
els). The scatterplot and regression analysis are shown,

and the assumptions for inference were satisfied.Dependent variable is: IQ_Verbal
R-squared = 6.5% s = 21.5291 df = 18
Variable Coefficient SE(Coeff)
Intercept 24.1835 76.38
Size 0.098842 0.0884
a) Test an appropriate hypothesis about the association
between brain size and IQ.
b) State your conclusion about the strength of this
association.

120
100
80
800
850
900
950
Brain Size (1000 pixels)
Verbal IQ

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