(b) Use a calculator to verify that Ex = 150.4, Ex2 = 3225.14, Ey = 244, Ey2 = 9570 and Exy = 5244.2. %3D %3D Compute r. (Round your answer to four decimal places.)
(b) Use a calculator to verify that Ex = 150.4, Ex2 = 3225.14, Ey = 244, Ey2 = 9570 and Exy = 5244.2. %3D %3D Compute r. (Round your answer to four decimal places.)
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
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Transcribed Image Text:Do larger universities tend to have more property crime? University crime statistics are affected by a variety of factors. The
surrounding community, accessibility given to outside visitors, and many other factors influence crime rate. Let x be a variable
that represents student enrollment (in thousands) on a university campus, and let y be a variable that represents the number of
burglaries in a year on the university campus. A random sample of n- 8 universities in California gave the following information
about enrollments and annual burglary incidents.
x 12.1| 28.0
24.5 14.3
7.5 27.7 16.2 20.1
y 28
69
39
23
15
30
15
25
A USE SALT
(a) Make a scatter diagram of the data. Then visualize the line you think best fits the data.
25
6 20
15
10
20
30
40
50
60
70
x (student enrollment (in thousands))
20
15
10
20
30
40
50
60
70
x(student enrollment (in thousands))
70f.
60
50
40
30
> 20
10
15
20
25
x (student enrollment (in thousands))
70
60
50
40
30
20
10
15
20
25
x (student enrollment (in thousands))
(b) Use a calculator to verify that Ex = 150.4, Ex? = 3225.14, Ey = 244, Ey? = 9570 and Exy = 5244.2.
Compute r. (Round your answer to four decimal places.)
As x increases, does the value or Impiy tat y soulu tena to ncrease or decrease? Explain your answer.
rof burglaries)
(annual number of burglaries)
Transcribed Image Text:10
15
20
25
x (student enrollment (in thousands))
70
60아
50
40
30
20
10
15
20
25
x (student enrollment (in thousands))
(b) Use a calculator to verify that Ex = 150.4, Ex² = 3225.14, Ey = 244, Ey2 = 9570 and Exy = 5244.2.
Compute r. (Round your answer to four decimal places.)
As x increases, does the value of r imply that y should tend to increase or decrease? Explain your answer.
Given our value of r, we can not draw any conclusions for the behavior of y as x increases.
Given our value of r, y should tend to decrease as x increases.
O Given our value of r, y should tend to increase as x increases.
Given our value of r, y should tend to
constant as x increases.
y(annual number of burglaries)
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