Question

A psychologist studying addiction tests whether cravings for cocaine and relapse are independent. The following table lists the observed frequencies in the small sample of people who use drugs.

Obs. Freq. | Relapse | |||
---|---|---|---|---|

Yes | No | |||

Cravings | Yes | 21 | 11 | 32 |

No | 8 | 17 | 25 | |

29 | 28 |
N = 57 |

(a) Conduct a chi-square test for independence at a 0.05 level
of significance. (Round your answer to two decimal places.)

(the correct symbols won't transfer but it is as follows) X^2obt
=

Decide whether to retain or reject the null hypothesis.

Retain the null hypothesis.

Reject the null hypothesis.

(b) Compute effect size using *ϕ* and Cramer's *V*.
*Hint:* Both should give the same estimate of effect size.
(If necessary, round your intermediate steps to two or more decimal
places. Round your answers to two decimal places.)

ϕ |
= | |

V |
= |

Answer #1

The statistical software output for this problem is :

(a)

= 6.35

Reject the null hypothesis.

(b)

= 0.33

V = 0.33

A psychologist studying addiction tests whether cravings for
cocaine and relapse are independent. The following table lists the
observed frequencies in the small sample of people who use
drugs.
Obs. Freq. Relapse
Yes No
Cravings Yes 21 12 33
No 6 15 21
27 27 N = 54
(a) Conduct a chi-square test for independence at a 0.05 level
of significance. (Round your answer to two decimal places.)
Decide whether to retain or reject the null hypothesis.
(b) Compute effect...

A psychologist studying addiction tests whether cravings for
cocaine and relapse are independent. The following table lists the
observed frequencies in the small sample of people who use
drugs.
Obs. Freq.
Relapse
Cravings Yes No
Yes 20 13 33
No 7 17 24
TOTAL 27 30 N=57
(a) Conduct a chi-square test for independence at a 0.05 level
of significance. (Round your answer to two decimal places.)
x^2{obt}=
(b) Compute effect size using ϕ and Cramer's V. Hint: Both
should...

A professor tests whether the loudness of noise during an exam
(low, medium, and high) is independent of test grades (pass, fail).
The following table shows the observed frequencies for this
test.
Noise Level
Low
Medium
High
Test
Pass
19
16
8
43
Fail
8
6
10
24
27
22
18
N = 67
(a) Conduct a chi-square test for independence at a 0.05 level
of significance. (Round your answer to two decimal places.)
=
Decide whether to retain or...

A professor tests whether the loudness of noise during an exam
(low, medium, and high) is independent of exam grades (pass,
fail).
The following table shows the observed frequencies for this
test.
Noise Level
Low Medium High
Exam Pass 19 16 9 44
Fail 9 6 10 25
28 22 19 N = 69
(a) Conduct a chi-square test for independence at a 0.05 level
of significance. (Round your answer to two decimal place)
Decide whether to retain or reject...

A professor tests whether the loudness of noise during an exam
(low, medium, and high) is independent of exam grades (pass, fail).
The following table shows the observed frequencies for this test.
Noise Level Low Medium High Exam Pass 21 16 8 45 Fail 8 5 10 23 29
21 18 N = 68 (a) Conduct a chi-square test for independence at a
0.05 level of significance. (Round your answer to two decimal
places.) $ \chi_{obt}^2 $ = Correct: Your...

A professor tests whether the loudness of noise during an exam
(low, medium, and high) is independent of exam grades (pass, fail).
The following table shows the observed frequencies for this test.
Noise Level Low Medium High Exam Pass 19 16 9 44 Fail 9 7 11 27 28
23 20 N = 71 (a) Conduct a chi-square test for independence at a
0.05 level of significance. (Round your answer to two decimal
places.) $ \chi_{obt}^2 $ = Decide whether...

A professor tests whether the loudness of noise during an exam
(low, medium, and high) is independent of exam grades (pass, fail).
The following table shows the observed frequencies for this
test.
Noise Level
Low
Medium
High
Exam
Pass
21
18
9
48
Fail
9
7
11
27
30
25
20
N = 75
(a) Conduct a chi-square test for independence at a 0.05 level
of significance. (Round your answer to two decimal places.)
=
Decide whether to retain or...

A professor tests whether the loudness of noise during an exam
(low, medium, and high) is independent of exam grades (pass, fail).
The following table shows the observed frequencies for this test.
Noise Level Low Medium High Exam Pass 19 16 9 44 Fail 9 6 10 25 28
22 19 N = 69 (a) Conduct a chi-square test for independence at a
0.05 level of significance. (Round your answer to two decimal
places.) $ \chi_{obt}^2 $ = Incorrect: Your...

A health psychologist tests a new intervention to determine if
it can change healthy behaviors among siblings. To conduct the this
test using a matched-pairs design, the researcher gives one sibling
an intervention, and the other sibling is given a control task
without the intervention. The number of healthy behaviors observed
in the siblings during a 5-minute observation were then
recorded.
Intervention
Yes
No
7
5
4
6
7
5
7
6
7
5
6
5
(a) Test whether or...

A health psychologist tests a new intervention to determine if
it can change healthy behaviors among siblings. To conduct the this
test using a matched-pairs design, the researcher gives one sibling
an intervention, and the other sibling is given a control task
without the intervention. The number of healthy behaviors observed
in the siblings during a 5-minute observation were then
recorded.
Intervention
Yes
No
5
4
3
5
6
4
6
5
6
4
5
4
(a) Test whether or...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 42 minutes ago

asked 59 minutes 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 2 hours ago

asked 2 hours ago

asked 3 hours ago

asked 3 hours ago