In a one-way ANOVA test, we conclude there are differences across population means if the

a. between variation is small relative to the within variation

b. between variation is large relative to the within variation

c. between variation and within variation are equal

Suppose a researcher sets up a design in which there are five different means and a total of 32 measurements in the study. For alpha = .01, the critical table F value is ____.

a. 4.07

b. 3.75

c. 3.78

d, 4.91

e. 4.1

The strength of a linear relationship in simple linear regression change if the units of the data are converted, say from feet to inches.

a. True

b. False

The contingency table in a chi-square test of independence between two variables has four rows and six columns representing the number of categories for each variable. The number of degrees of freedom associated with the test statistic is __________.

a.15

b. 24

c. 10

d. 20

Which of the following statements is true regarding the chi-square goodness-of-fit test for normality:

a. The test does depend on which and how many categories we use for the histogram.

b. The test is not very effective unless the sample size is large, say, at least 80 or 100.

c. The test tends to be too sensitive if the sample size is really large.

d. None of the above responses are true

e. Responses a, b and c are correct

The weakness of scatterplots is that they:

a. do not actually quantify the relationships between variables

b. only help identify outliers

c. can be misleading about the types of relationships they indicate

d. do not help identify linear relationships

A cost accountant is developing a regression model to predict the total cost of producing a batch of printed circuit boards as a linear function of batch size (the number of boards produced in one lot or batch). The slope of the accountant’s model is ______.

a. unit variable cost

b. total variable cost

c. fixed cost

d. batch size

e. total cost

A chi-square goodness-of-fit test can be used as an alternative to z-test for population proportions if there are only two classifications.

a. true

b. false

Answer rating: 100% (QA)

1 In a Oneway Anova the test statistic is the ratio of the quantities MSB Mean of Square between gro... View the full answer