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Multiple Choice Quiz
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1
The chi-square test can be used for testing:
A)independence
B)equality of proportions
C)equality of medians
D)all of the above
E)none of the above
2
The only assumptions required for the Mann-Whitney U test are:
A)independent samples
B)random samples
C)normal populations
D)a and b
E)a, b and c
3
The nonparametric test that is analogous to the One-Way ANOVA is the:
A)Kruskal-Wallis test
B)Friedman test
C)Mann-Whitney U test
D)Wilcoxon Signed-Rank test
E)none of the above
4
The assumptions needed for the Sign test are:
A)independent samples
B)at least ordinal values
C)normality
D)A and B
E)A, B and C
5
The test for randomness is the:
A)runs test
B)Cox and Stuart test
C)McNemar test
D)sign test
E)none of the above
6
Which of the following tests is not based on ranks?
A)Friedman test
B)Kruskal-Wallis test
C)Wald-Wolfowitz test
D)Mann-Whitney U test
E)Wilcoxon Signed-Rank test
7
In a test for equality of proportions, with a table having three rows and six columns, the degrees of freedom are:
A)3
B)6
C)18
D)16
E)10
8
A sample of consumers of coffee is selected and asked whether they had coffee with sugar or without. How many runs are in this data?

S N N N S N N S S S S N N S N N N S S N S S S S

A)24
B)2
C)11
D)12
E)none of the above
9
The size of the operating system of a microcomputer (in Kilobytes) has been varying as shown below, over the last eight years.

38, 41, 45, 43, 44, 42, 47, 50

Compute the test statistic to test for a positive trend.

A)T = 2
B)T = 3
C)T = 4
D)T = 8
E)T = 6

Use the following to answer question 10:

The following table gives the average weekly cost of groceries for a four member family, in four different cities.

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10
Compute the test statistic to test for significantly different costs in these four cities.
A)between 20 and 30
B)between 10 and 20
C)between 40 and 50
D)between 30 and 40
E)none of the above
11
A manager wants to know if there is any correlation between the job performance of his staff and their scores on a particular test. The following table ranks the ten employees on the basis of their test scores, and on their job performance.

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Compute the Spearman rank correlation coefficient for this data.

A)0.8667
B)0.9354
C)0.76
D)0.6121
E)none of the above
12
The average life of a battery is supposed to be 250 hours of continuous operation. A random sample of 25 batteries is subject to discharge and the lifetime is recorded. The data is as follows (in hours):

214, 289, 263, 291, 240, 207, 277, 252, 285, 287, 250, 297, 268, 286, 211, 232, 282, 216, 223, 234, 219, 280, 239, 249, 230

Using the sign test to test whether there is statistical evidence to conclude that the life of the battery is less than 250 hours, find the test statistic.
A)10
B)12
C)13
D)25
E)none of the above





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