Under what circumstances should the chi-square statistic not be used?

Select one:

a.

if fe< 5 for any cell

b.

if fe= fofor any cell

c.

if fe> 5 for any cell

d.

if fe=7 for any cell

In an independent-measures hypothesis test, what must be true if t = 0?

Select one:

a.

The two population means must be equal.

b.

The two sample means must be equal.

c.

The two sample variances must be equal.

d.

The two sample means are not equal.

What provides a measure of the variance caused by random, unsystematic differences?

Select one:

a.

MS

b.

SStotal

c.

the error term

d.

the F ratio

In regression, the coefficient of determination (r2) is used to determine

Select one:

a.

the likelihood of a type I error while using simple regression

b.

the significance of the slope (b)

c.

the significance of the F-test

d.

the proportion of variability in Y that can be predicted by X

For an analysis of variance comparing three treatment means, H0 states that all three population means are the same and H1 states that all three population means are different.

Select one:

a.

True

b.

False

One characteristic of the chi-square tests is that they can be used when the data are measured on a nominal scale.

Select one:

a.

True

b.

False

Which of the following is a fundamental difference between the t statistic and a z-score?

Select one:

a.

The t statistic is used for large samples only.

b.

The t statistic uses the sample variance in place of the population variance.

c.

The t statistic computes the standard error by dividing the standard deviation by n - 1 instead of dividing by n.

d.

The t statistic uses the sample mean in place of the population mean.

What is indicated by a positive value for a correlation?

Select one:

a.

Increases in X tend to be accompanied by decreases in Y.

b.

A much stronger relationship exists than if the correlation were negative.

c.

Increases in X tend to be accompanied by increases in Y.

d.

A much weaker relationship exists than if the correlation were negative.

In the general linear equation, Y = bX + a, what is the value of y if x = 1, b = 2, and a = 3?

Select one:

a.

-5

b.

4

c.

there is not enough information to calculate Y

d.

5

The between treatment variance within an ANOVA is made up of

Select one:

a.

both the treatment effect and error

b.

need more information to answer the question

c.

only error

d.

only the treatment effect