Question

A Kruskal-Wallis test is used to compare a continuous outcome in matched samples where there are greater than two matches.

Answer #1

Suppose you want to use the Kruskal-Wallis H-test to compare
the probability distributions of three populations. The following
data represent independent random samples selected from the three
populations. Use this data to complete parts a through d below.
I
II
III
36
22 72
54
20 101
63
78 89
56
40 25
84
36 81
71
42 76
46
34
a. What type of experimental design was used?
A. Paired Difference
B. Completely Randomized.
C. Randomized Block
b.
Specify...

A pharmacist wants to compare a health outcome among three
treatment groups. The health outcome data is ordinal (Likert)
scale. Which of following methods is the best choice?
A. Kruskal-Wallis Analysis
B. One-way ANOVA
C. t-Test
D. Wilcoxon rank sum test

Write a paragraph explaining the following
inferential statistical results:
The results of a Kruskal-Wallis test were significant
(X2(4)= 57.56, p <.001) between the
following two statements (360 leaders and supervisors answered the
survey questions):
Statement 1: As a successful leader, I always think
that the best decision will be the one with the largest
consensus.
Statement 2. As a leader, I do not discuss my decisions with my
employees; I just tell them what they have to do.

Write a paragraph explaining the following inferential
statistical results:
The results of a Kruskal-Wallis test were significant (X2(3)=
59.32, p <.001) between the following two statements (360
leaders and supervisors answered the survey questions):
Statement 1: As a successful leader, I always think that the
best decision will be the one with the largest
Statement 2: I always make sure to have my employees’
approval before making any changes to their working
conditions or role, even if just for a...

Four different paints are advertised to have the same drying
times. Use the Kruskal Wallis Test – Analysis of Variance by Ranks,
to verify the manufacturer’s claim. Remember that seven samples
were tested for each of the paints. The time in minutes until the
paint was dry enough for a second coat to be applied was recorded.
Below are the results. Paint 1 Rank Paint 2 Rank Paint 3 Rank Paint
4 Rank 114 112 126 115 117 118 127...

14. The Wilcoxon Signed Rank test is used _________
(A)
Only with independent samples
(B)
Only in matched pairs samples (dependent samples)
(C)
To test for randomness
(D)
As an alternative to the Kruskal-Wallis test
15. Which of the following test must be two-sided?
(A)
Wilcoxon Signed Rank
(B)
Kruskal-Wallis
(C)
Runs test
(D)
Sign test
16. In testing for the difference between two populations, it is
possible to use _________
(A)
The Wilcoxon Rank-Sum test
(B)
The Sign test...

1. When is the Chi-square test not ideal?
A. To compare independent samples of ratio or interval level
data
B. To compare independent samples of ordinal or nominal level
data
C. When all cells within 2x2 tables have an observed value
greater than or equal to 10.
D. A & B

Life situation where could be used statistical inference
(confidence interval or hypothesis test) on two samples? how would
you do it?

The following two samples were collected as matched pairs.
Complete parts? (a) through? (d) below. Pair 1 2 3 4 5 6 7 Sample 1
4 5 8 5 7 6 7 Sample 2 5 3 4 3 4 5 4 a. State the null and
alternative hypotheses to test if a difference in means exists
between the populations represented by Samples 1 and 2. Let mud be
the population mean of? matched-pair differences for Sample 1 minus
Sample 2....

Select the statement that is true.
The independent variable is only used in the independent t-test
and the dependent variable is only used in the dependent
t-test.
The independent t-test is never used in a calculation with more
than two groups or sets of data.
Independent means that the independent t-test is not related to
any other type of t-test.
The matched pairs t-test will usually have greater variance than
the independent t-test when using the same variables.

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