A forensic psychologist who specializes in personality traits and their relationship to crime hypothesizes that those higher in the trait of thrill-seeking will be more likely to commit burglaries. The scores on a measure of thrill seeking and the number of arrests for burglary (and the corresponding z-scores) were as follows for a group of convicted felons from urban communities:

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 4BGP
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  1. A forensic psychologist who specializes in personality traits and their relationship to crime hypothesizes that those higher in the trait of thrill-seeking will be more likely to commit burglaries. The scores on a measure of thrill seeking and the number of arrests for burglary (and the corresponding z-scores) were as follows for a group of convicted felons from urban communities:

 

THRILLSEEK

# ARRESTS

Z-THRILLSEEK

Z-ARRESTS

36

10

2.55

1.87

29

9

0.89

1.63

27

8

0.41

1.15

27

6

0.41

0.42

26

5

0.18

0.30

26

3

0.18

-0.54

26

4

0.18

0.06

25

4

-0.06

0.06

25

4

-0.06

0.06

25

5

-0.06

0.18

25

5

-0.06

0.18

25

5

-0.06

0.18

23

3

-0.53

-0.54

23

1

-0.53

-1.75

22

2

-0.77

-1.15

14

1

-2.67

-1.75

 

Using α of .05, what has the researcher found? Explain in layperson’s terms.  

 

Let’s say you have a sample of 16 convicted felons from suburban communities and for them the r for thrill-seeking and burglary arrests is .55 (sig. at alpha .05).   Is the relationship between thrill-seeking and burglary different for criminals from urban and suburban communities?  Explain to the lay audience. Test at alpha .05

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