Question

A forensic psychologist tests the extent to which the age of a
criminal (*X*) predicts the age of the victim (*Y*)
for nonviolent crimes. The psychologist uses the case files to
record the age of five criminals and the age of the victim in those
cases. The hypothetical data are listed in the following table.

Age of Criminal | Age of Victim |
---|---|

X |
Y |

33 | 25 |

24 | 21 |

28 | 26 |

17 | 22 |

12 | 17 |

(a) Compute the method of least squares to find the equation of
the regression line. (Round your answers to three decimal
places.)

= ______ *X* + ______

(b) Use the regression equation to determine the predicted age of a
victim of a nonviolent crime when the criminal is 20 years old.
(Round your answer to three decimal places.)

years old

Answer #1

The statistical software output for this problem is:

Hence,

a) Regression equation:

Y = **0.368** X + **13.799**

b) Predicted value = 0.368 * 20 + 13.799 =
**21.159**

A forensic psychologist tests the extent to which the age of a
criminal (X) predicts the age of the victim (Y) for nonviolent
crimes. The psychologist uses the case files to record the age of
five criminals and the age of the victim in those cases. The
hypothetical data are listed in the following table.
Age of Criminal Age of Victim
X Y
32 24
24 20
28 25
17 22
12 17
(a) Compute the method of least squares...

A forensic psychologist tests the extent to which the age of a
criminal (X) predicts the age of the victim (Y) for nonviolent
crimes. The psychologist uses the case files to record the age of
five criminals and the age of the victim in those cases. The
hypothetical data are listed in the following table.
Age of
Criminal
Age of
Victim
X
Y
32
25
24
20
28
25
17
23
13
17
A) Compute the method of least squares...

A forensic psychologist tests the extent to which the age of a
criminal (X) predicts the age of the victim (Y)
for nonviolent crimes. The psychologist uses the case files to
record the age of five criminals and the age of the victim in those
cases. The hypothetical data are listed in the following table.
Age of
Criminal
Age of
Victim
X
Y
32
25
24
21
28
25
17
23
12
16
(a) Compute the method of least squares...

A forensic psychologist tests the extent to which the age of a
criminal (X) predicts the age of the victim (Y)
for nonviolent crimes. The psychologist uses the case files to
record the age of five criminals and the age of the victim in those
cases. The hypothetical data are listed in the following table.
Age of
Criminal
Age of
Victim
X
Y
33
25
25
21
29
25
17
22
13
16
(a) Compute the method of least squares...

A forensic psychologist tests the extent to which the age of a
criminal (X) predicts the age of the victim (Y) for nonviolent
crimes. The psychologist uses the case files to record the age of
five criminals and the age of the victim in those cases. The
hypothetical data are listed in the following table.
Age of Criminal: 32, 25, 29, 18, 12
Age of Victim X Y 25, 20, 25, 22, 16
Compute the method of least squares to...

15.) A forensic psychologist tests the extent to which the age
of a criminal (X) predicts the age of the victim
(Y) for nonviolent crimes. The psychologist uses the case
files to record the age of five criminals and the age of the victim
in those cases. The hypothetical data are listed in the following
table.
Age of
Criminal
Age of
Victim
X
Y
33
24
25
20
28
25
18
23
12
17
(a) Compute the method of least...

1. An instructor measured quiz scores and the number of hours
studying among a sample of 20 college students. If SSXY = 44, SSX =
98, MY = 6, and MX = 4, then what is the regression equation for
this sample? (Round your numerical values to three decimal
places.)
= _______ X +________
2. A forensic psychologist tests the extent to which the age of
a criminal (X) predicts the age of the victim (Y)
for nonviolent crimes. The...

Let x be a random variable representing percentage
change in neighborhood population in the past few years, and let
y be a random variable representing crime rate (crimes per
1000 population). A random sample of six Denver neighborhoods gave
the following information.
x
30
3
11
17
7
6
y
170
35
132
127
69
53
Σx = 74; Σy = 586; Σx2 =
1,404; Σy2 = 71,248; Σxy = 9,617
(a) Find x, y, b, and the equation of...

Let x be the age in years of a licensed automobile
driver. Let y be the percentage of all fatal accidents ( for a
given age) due to speeding. For example, the first data pair
indicates that 36% of all fatal accidents involving 17 year olds
are due to speeding.
X: 17 27. 37. 47. 57. 67. 77
Y: 36. 25. 20. 12. 10. 7. 5.
Find the sample mean for x.(round to the nearest whole number) and
y (...

Let x be the age in years of a licensed automobile
driver. Let y be the percentage of all fatal accidents
(for a given age) due to speeding. For example, the first data pair
indicates that 34% of all fatal accidents of 17-year-olds are due
to speeding.
Given: Σx = 329, Σy = 114,
Σx2 = 18,263,
Σy2 = 2582, Σxy =
3988, and r ≈ −0.961.
(c) Find x, and y. Then find the equation of
the least-squares line...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago