Question
In: Statistics and Probability
A psychologist studying addiction tests whether cravings for cocaine and relapse are independent. The following table...
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 | 10 | 31 |
| No | 7 | 18 | 25 | |
| 28 | 28 | N = 56 | ||
(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.
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 | = |
Solutions
orchestra answered 2 years agoRelated Solutions
A psychologist studying addiction tests whether cravings for cocaine and relapse are independent. The following table...
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
13
34
No
6
16
22
27
29
N = 56
(a) Conduct a chi-square test for independence at a 0.05 level
of significance. (Round your answer to two decimal places.)
=
(b) Compute effect size using ϕ and Cramer's V.
Hint: Both...
A researcher tests whether the political affliction of individuals is related to or independent of whether...
A researcher tests whether the political affliction of
individuals is related to or independent of whether they have
positive views of the economy. The researcher records the political
affiliations and economic viewpoints of 105 participants.
(Affiliation: 1 = Democrat, 0 = Republican, Economy: 1 = Positive,
0 = Negative). Data: Affiliation: Democrat = 67, feel Economy is
positive = 35, negative = 32. Affiliation: Republican = 20, feel
Economy is positive = 20, negative = 18.
Research Scenario: A clinical psychologist is studying whether aerobic exercise improves anxiety in veterans diagnosed with...
Research Scenario: A clinical psychologist is
studying whether aerobic exercise improves anxiety in veterans
diagnosed with PTSD. Participants agreed to take an anxiety measure
before and after a 4 week aerobic exercise plan (5 workouts per
week for four weeks). The values provided in the table are anxiety
scores (scale measurement) collected before and after the aerobic
exercise sessions, with higher numbers indicating higher anxiety.
Using this table, enter the data into a new SPSS data file
and run a...
A researcher tests whether homeownership (own, rent/other) is related to or independent of participants positive or...
A researcher tests whether homeownership (own, rent/other) is
related to or independent of participants positive or negative
views of the economy. The researcher records whether or not 105
participants own a home and whether their economic viewpoint is
positive or negative. The following table lists the observed
frequencies for this study. Conduct a chi-squared test for
independence at a .05 level of significance. Decide whether to
retain or reject the null hypothesis.
Positive
Negative
Own
35 32
67
Rent/Other 20
18 ...
Numeric results for several independent samples t tests are presented here. Decide whether each test is...
Numeric results for several independent samples t tests
are presented here. Decide whether each test is statistically
significant, and report each result in the standard APA
format.
A total of 73 people were studied, 40 in one group and
33 in the other group. The test statistic was calculated as 2.13
for a two tailed test with a p level of .05
One group of 23 people was compared to another group of
18 people. The t statistic obtained for...
Name the test or tests that are appropriate to answer the following questions. (a) Whether the...
Name the test or tests that are appropriate to answer
the following questions.
(a) Whether the slope of the best fit line is different
from zero?
(b) Whether the slope of the best fit line is greater
than 1?
(c) Whether the intercept is different from
zero?
(d) Whether the intercept is less than - 3?
These questions are related to Regression. Please
explain why these tests would be best so I can
understand.
For each of the following tests of hypotheses, determine whether the null hypotheses should be rejected....
For each of the following tests of hypotheses, determine whether
the null hypotheses should be rejected. Use the classical method by
finding the lower xL and upper xU limits for two-tail tests (or one
of the two for a one-tail test). Additionally, don't forget to use
a t-value (rather than a z-value) when n<30.
A) Ho: µ = 6,000 Ha: µ ≠ 6,000; n = 70; x = 6,150; σ = 2,600; α
= .01
B) Ho: µ = 50...
In Java I need a Flowchart and Code. Write the following method that tests whether the...
In Java I need a Flowchart and Code. Write the
following method that tests whether the array has four consecutive
numbers with the same value: public static boolean
isConsecutiveFour(int[] values) Write a test program that prompts
the user to enter a series of integers and displays it if the
series contains four consecutive numbers with the same value. Your
program should first prompt the user to enter the input size—i.e.,
the number of values in the series.
Determine whether the following pairs of functions are linearly independent or not on the whole real...
Determine whether the following pairs of functions are linearly
independent or not on the whole real line.
Determine whether the following pairs of functions are linearly independent or not on the whole real line. BEWARE: You only get 3 tries. Linearly dependent * 1. f(theta) = 14 cos 3theta and g(theta) = 56cos^3 theta - 42 cos theta. Linearly dependent 2. f(t) = t^2 + 14t and g(t) = t ^2 - 14t Linearly dependent 3.f(t)=t and g(t)=|t|
in each of these independent situations please decide whether the following items on the fact of...
in each of these independent situations please decide whether
the following items on the fact of an OTHERWISE negotiable
instrument renders the instrument non-negotiable?
a) Note signed in the upper left hand corner
b) Draft directing to pay out of next month's sales
c) Note promising to pay in accordance with the mortgage
terms
d) Draft payable in 1000 euros
e) Note payable upon your death
f) Draft payable whenevr you present it to drawee
g) Note promising to "Pay...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- 1. Creep is one of deformation that occurred in concrete structure. Give one example that can...
- Why does a particular codon represent only one specific amino acid?
- Write a function template sort that takes two references to generic objects and switches them if...
- What 2 things happen to the melting point of a solid when an impurity is present?
- How Can Hominin Evolution be characterized as " mosaic evolution" Use examples of species from the...
- Absorption and Variable Costing Income Statements for Two Months and Analysis During the first month of...
- Mobile and wireless devices are being increasingly used in the Business Administration and Management Industry. write...
ADVERTISEMENT