Neurologists have found that the hippocampus, a structure located in the brain, plays an important role inshort-term memory. Data was collected on 21 Vietnam veterans with combat related post-traumatic stressdisorder. Magnetic resonance imaging was used to measure the volume of the right hippocampus (in cubicmillimeters) of each subject, while the verbal memory retention of each subject was measured by thepercent retention subscale of the Wechsler Memory Scale.The least squares line relating verbal memory (y) with right hippocampal volume (x) was found to be4 + 3x. The slope of the regression line can be interpreted in the following way:ŷ=When right hippocampal volume decreases by one cubic millimeter, the verbal memory scoreincreases by 3%.When right hippocampal volume decreases by one cubic millimeter, the verbal memory scoreincreases by 4%.When right hippocampal volume increases by one cubic millimedecreases by 3%.the verbal memory scoreWhen right hippocampal volume increases by one cubic millimeter, the verbal memory scoreincreases by 4%.O When right hippocampal volume increases by one cubic millimeter, the verbal memory scoreincreases by 3%.

The regression line is given by y = 4 + 3x. Where, y = verbal memory and X = right hippocampul…

Answered: The least squares line relating verbal…

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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A recent Gallup survey of a random sample of Americans (18 and older) found that the average number of alcoholic drinks consumed per week (drinks) by males was 4.2 and by females was 1.4.[¹] Suppose we use the underlying survey data to estimate a least-squares regression of the average number of drinks a person reports consuming per week (Drinks;) on a dummy variable equal to 1 if i is female and 0 otherwise (Female;). (Assume all respondents identify as either male or female.) The estimated regression line equation can be written as: Drinks = a +bFemale Alcohol Consumption by Gender What is the numerical value of b?
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The least squares line relating verbal memory (y) with right hippocampal volume (x) was found to be ŷ = 4 + 3x. The slope of the regression line can be interpreted in the following way: