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CAN YOU DO in 20 minutes   Question 1     The pooled-variance t…

CAN YOU DO in 20 minutes

 

Question 1

 

 

The pooled-variance t test assumes that the two populations are normally distributed, with equal variances.
 

Select one:

True

False

 

 

 

 

Question 2

 

 

For situations in which the two independent populations can be assumed to be normally distributed but cannot be assumed to have equal variances, use the separate-variance t test
 

Select one:

True

False

 

 

 

 

Question 3

 

 

The F test for the ratio of two variances determines whether there is evidence of a difference in the two population means.
 

Select one:

True

False

 

 

 

 

Question 4

 

In matched samples, items or individuals are paired together according to some characteristic of interest.
 

Select one:

True

False

 

 

 

 

 

Question 5

 

 

In testing for a difference between two variances using the F test, one assumes that each of the two populations is normally distributed.
 

Select one:

True

False

 

 

 

 

Question 6

 

 

Analysis of variance, known by the acronym ANOVA, allows statistical comparison among samples taken from two normally distributed populations.
 

Select one:

True

False

 

 

 

Question 7

 

One-way ANOVA is a two-part process, and both parts are always carried out.
 

Select one:

True

False

 

 

 

Question 8

 

To use the one-way ANOVA F test, one must make three assumptions.

 

Which is NOT one of those assumptions?

 

Select one:

a. Homogeneity of variance (the variances of the c groups are equal)

b. Homogeneity of means (the means of the c groups are equal)

c. Normality of the c groups from which the samples are selected

d. Randomness and independence of the samples selected 

 

 

 

Question 9

 

The χ 2  test can be used to to compare differences among more than two independent populations.
 

Select one:

True

False

 

 

Question 10

 

Rejecting the null hypothesis in a χ 2 test of equality of proportions in a 2c table enables one to reach only the conclusion that not all c population proportions are equal. 

 

True or False?:  The multiple-comparisons Marascuilo procedure determines which pairs of sample proportions differ by comparing every pair of c sample proportions.
 

Select one:

True

False

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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