Computer abuse by employees is an ongoing worry to businesses. A study revealed the data shown below. At α = .02, is the frequency of disciplinary action independent of the abuser’s level of privilege? Computer Abuse I
1.
award:
10.00 points
Computer abuse by employees is an ongoing worry to businesses. A study revealed the data shown below.
At α = .02, is the frequency of disciplinary action independent of the abuser’s level of privilege?
Computer Abuse Incidents Cross-Tabulated by Privilege and Punishment
Level of Privilege
Disciplined
Not Disciplined
Row Total
Low
20
2
22
Medium
25
10
35
High
38
12
50
Col Total
83
24
107
Click here for the Excel Data File
Calculate the Chi-square test statistic, degrees of freedom and the p-value. (Round your test statistic
value to 2 decimal places and the p-value to 4 decimal places.)
Test statistic
d.f.
p-value
(a) The hypothesis for the given issue is H0: Privilege Level and Disciplinary Action are independent.
No
Yes
(c) Find the critical value for Chi-Square. Refer to the chi-square table. (Round your answers to 3 decimal
places.)
Critical value
(d) We can reject the null hypothesis and find dependence. Is the statement true or false?
TRUE
FALSE
Worksheet
Learning Objective: 15-01 Recognize a
contingency table.
Learning Objective: 15-03 Perform a chi-square
test for independence on a contingency table.
Difficulty: 2-Medium
Learning Objective: 15-02 Find degrees of
freedom and use the chi-square table of critical
values.
Learning Objective: 15-06 Use computer
software to perform a chi-square GOF test for
normality.
[The following information applies to the questions displayed below.]
At a local supermarket receiving dock, the number of truck arrivals per day is recorded for 100 days.
Arrivals per Day at a Loading Dock
0
1
2
Frequency
8
24
25
Number of Arrivals
3
21
4
8
5
7
6
6
7
1
Total
100
Click here for the Excel Data File
2.
award:
10.00 points
(a) Estimate the mean from the sample. (Round your answer to 2 decimal places.)
Sample mean
Worksheet
Difficulty: 3-Hard
Learning Objective: 15-05 Explain the GOF test
for a Poisson distribution.
3.
award:
10.00 points
(b-1) Carry out the chi-square test, combining end categories as needed to ensure that all expected
frequencies are at least five. (Perform a Poisson Goodness of Fit test for alpha = .01, combining
the last three categories into a single category for 5 or more. Do not round your intermediate
calculations. Round your answers to 4 decimal places.)
Chi-square
d.f.
p-value
Worksheet
Difficulty: 3-Hard
Learning Objective: 15-05 Explain the GOF test
for a Poisson distribution.
4.
award:
10.00 points
(b-2) Truck arrivals per day follow a Poisson process.
False
True
Multiple Choice
Difficulty: 3-Hard
Learning Objective: 15-05 Explain the GOF test
for a Poisson distribution.
