Question

In a Wilcoxon signed rank test, the test statistic is calculated
as 20. If there are n=10 observations for which Ha D>0, and a
test is performed at the 5% significance level, then:

A )reject the null hypothesis

B )dont reject the null hypothesis

C )the test results are inconclusive

D )perform a parametric test

Answer #1

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...

Use a Wilcoxon Signed Rank Test of the alternate hypothesis H1 :
µ does not equal 7.39 and the following data:
7.02 7.35 7.34 7.17 7.28 7.77 7.09
7.22 7.45 6.95 7.40 7.10 7.32 7.14
to report the observed level of statistical significance.

Suppose you have a two sided hypothesis test, Ha:
? ? ?0 with a test statistic
z=2.70. Determine the p-value and give the decision of
this test. Use a 5% level of significance.
a) P-value of 0.0035, reject the null hypothesis.
b) P-value of 0.0035, fail to reject the null hypothesis.
c) P-value of 0.9931, fail to reject the null hypothesis.
d) P-value of 0.0069, reject the null hypothesis.

Section: 17-1 The Wilcoxon Signed Rank Test for One Population
Median The General Electric service department believes that the
median time for a service call should be 30 or fewer minutes. To
test this, the following random sample of service times was
collected (shown below). Given that the managers do not wish to
make the assumption that the population is normally distributed,
the critical value for the test about median service times, using a
.05 level of significance, is: Time...

Using the statistical procedure THE WILCOXON SIGNED RANK
TEST
that makes use of the magnitudes of the differences between
measures and a
hypothesized location parameter rather than just the signs of
the differences.
Sixteen laboratory animals were fed a special diet from birth
through age 12 weeks. Their
weight gain (in grams) were as follows:
63 68 79 65 64 63 65 64 76 74 66 66 67 73 69 76
Can we conclude from these data that the diet...

Suppose that the
p-value associated with a test statistic is 0.15. In this case,
Group of answer choices
should reject the null at the 10-percent and 5-percent levels of
significance, but not at the 1-percent level.
should reject at the 5-percent level of significance, but not at
the 5-percent level or lower levels of significance.
you should reject the null hypothesis at the 10-percent,
5-percent, and 1-percent levels of significance.
should not reject the null hypothesis at the 10-percent,
5-percent,...

1.) Choose the true statement.
a.) If a null hypothesis is rejected for a test statistic at the
α=0.05 level, then at the α=0.01 level it would
never reject.
b.) If a null hypothesis is rejected for a test statistic at the
α=0.05 level, then at the α=0.01 level it would
always reject.
c.) If a null hypothesis is rejected for a test statistic at the
α=0.05 level, then at the α=0.01 level it may or
may not reject.
2.)...

With H0: p = 0.4, Ha: p < 0.4 , the test statistic is z = –
1.68. Using a 0.05 significance level, the P-value and the
conclusion about null hypothesis are:
ِA) 0.0465; reject H0
B) 0.093; fail to reject H0
C) 0.9535; fail to reject H0
D) 0.0465; fail to reject H0
what is the correct answer?

Using the THE WILCOXON SIGNED-RANK TEST
Sixteen laboratory animals were fed a special diet from birth
through age 12 weeks. Their
weight gain (in grams) were as follows:
63 68 79 65 64 63 65 64 76 74 66 66 67 73 69 76
Can we conclude from these data that the diet results in a mean
weight gain of less than 70
grams? Let α = 0.05.
Note: There are two possible ways to analyze this data. Use the...

A statistical test is performed and it results in a p-value =
0.007. Using a significance level of α = 0.001, what is your final
decision and conclusion?
A
Reject the null hypothesis. We do not have evidence in favor of
the alternative.
B
Reject the null hypothesis. We have evidence in favor of the
alternative.
C
Fail to reject the null hypothesis. We do not have evidence in
favor of the alternative.
D
Fail to reject the null hypothesis....

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