The well-known psychologist Dr. Elbod has established what he calls his Generalized Anxiety Scale (GAS). The GAS, which is a scale from 0 to 10, measures the "general anxiety" of an individual, with higher GAS scores corresponding to more anxiety. (Dr. Elbod's assessment of anxiety is based on a variety of measurements, both physiological and psychological.) The bivariate data below give the GAS score (denoted by x) and the number of hours of sleep last night (denoted by y) for each of the fifteen adults in a study. The least-squares regression line for these data has equation y=8.57-0.29x. This line, along with a scatter plot of the sample data, is shown below. GAS score, x 8.0 7.1 2.0 3.4 1.6 6.1 8.1 6.4 4.9 2.8 4.0 1.0 3.8 9.1 9.0 Send data to calculator V Sleep time, y (in hours) 7.0 6.6 7.8 7.9 9.0 8.2 5.4 6.2 6.6 6.9 7.0 7.4 8.6 6.0 5.2 Sleep time (in hours) Based on the study's data and the regression line, complete the following. 10- 0 (a) For these data, sleep times that are greater than the mean of the sleep times tend to be paired with GAS scores that are (Choose one) the mean of the GAS scores. (b) According to the regression equation, for an increase of one in GAS score, there is a corresponding decrease of how many hours in sleep time? x GAS score X S
The well-known psychologist Dr. Elbod has established what he calls his Generalized Anxiety Scale (GAS). The GAS, which is a scale from 0 to 10, measures the "general anxiety" of an individual, with higher GAS scores corresponding to more anxiety. (Dr. Elbod's assessment of anxiety is based on a variety of measurements, both physiological and psychological.) The bivariate data below give the GAS score (denoted by x) and the number of hours of sleep last night (denoted by y) for each of the fifteen adults in a study. The least-squares regression line for these data has equation y=8.57-0.29x. This line, along with a scatter plot of the sample data, is shown below. GAS score, x 8.0 7.1 2.0 3.4 1.6 6.1 8.1 6.4 4.9 2.8 4.0 1.0 3.8 9.1 9.0 Send data to calculator V Sleep time, y (in hours) 7.0 6.6 7.8 7.9 9.0 8.2 5.4 6.2 6.6 6.9 7.0 7.4 8.6 6.0 5.2 Sleep time (in hours) Based on the study's data and the regression line, complete the following. 10- 0 (a) For these data, sleep times that are greater than the mean of the sleep times tend to be paired with GAS scores that are (Choose one) the mean of the GAS scores. (b) According to the regression equation, for an increase of one in GAS score, there is a corresponding decrease of how many hours in sleep time? x GAS score X S
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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Transcribed Image Text:The well-known psychologist Dr. Elbod has established what he calls his Generalized Anxiety Scale (GAS). The GAS, which is
a scale from 0 to 10, measures the "general anxiety" of an individual, with higher GAS scores corresponding to more
anxiety. (Dr. Elbod's assessment of anxiety is based on a variety of measurements, both physiological and psychological.)
The bivariate data below give the GAS score (denoted by x) and the number of hours of sleep last night (denoted by y) for
each of the fifteen adults in a study. The least-squares regression line for these data has equation y = 8.57-0.29x. This
line, along with a scatter plot of the sample data, is shown below.
GAS score, x
8.0
7.1
2.0
3.4
1.6
6.1
8.1
6.4
4.9
2.8
4.0
1.0
3.8
9.1
9.0
Send data to calculator V
Sleep time, y
(in hours)
7.0
6.6
7.8
7.9
9.0
8.2
5.4
6.2
6.6
6.9
7.0
7.4
8.6
6.0
5.2
Sleep time
(in hours)
Based on the study's data and the regression line, complete the following.
10+
0
X
X
X
(a) For these data, sleep times that are greater than the mean of the sleep times
tend to be paired with GAS scores that are (Choose one) ▼ the mean of the
GAS scores.
X
(b) According to the regression equation, for an increase of one in GAS score, there is
a corresponding decrease of how many hours in sleep time?
GAS score
X
x
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