Answered: Researchers at UC San Francisco…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

Researchers at UC San Francisco discovered that high
plasma levels of vitamins B, C, D, and E are associated

with better cognitive performance. “Each standard devia-
tion higher plasma level for these vitamins predicted a

global cognitive score 0.28 standard deviations better,”
the researchers reported. Which value are the researchers
interpreting in this statement?
A) the correlation coefficient between plasma level and
cognitive score
B) the y-intercept of the regression model predicting
cognitive score from plasma level
C) the slope of the regression model predicting cognitive
score from plasma level
D) the standard deviation of the regression model’s
residuals
E) R2
for the regression model

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