120 100 80 800 850 900 950 Brain Size (1000 pixels) Verbal IQ
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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Topic Video
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
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 andregression analysis are shown,
els). The scatterplot and
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.
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.
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