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Exam 13: Bivariate Statistical Analysis: Tests of Differences

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Question 1

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In the F-test, if the F-value is large, then:

A) the results are likely to be statistically inconclusive.
B) the results are likely to be statistically insignificant.
C) the more likely the differences in means has occurred as a result of the grouping variable.
D) the less likely the differences in means has occurred as a result of the grouping variable.

E) A) and D)
F) A) and C)

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C

Question 2

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When conducting an independent samples t-test in SPSS, the metric variable is set as the ____ variable and the nonmetric variable as the ________ variable.

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test; grouping

Question 3

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To compare the prices charged by the same retailers in their shops and on their websites, which of the following statistical tests is appropriate?

In comparing the difference of the means between two groups, the null hypothesis can be stated as:

The F-test partitions the total variance into within-group variance and between-group variance.

In situations where the data is nonmetric and not normally distributed, _____________ techniques can be used.

________ of ________ is the appropriate test to use when comparing the means of three or more groups to see if they are significantly different from each other.

The paired samples t-test is used to compare the means of two _______ groups (for example, sales performance before and after a training program) to see if they are significantly different from one another.

A procedure used to determine whether there is more variability in the scores of one sample than in the scores of another is called the ______.

Suppose you used a 9-point rating scale to compare men who had an annual income over $50 000 (Group 1) with men who had an annual income less than or equal to $50 000 (Group 2) on their liking of a new product. If you studied 40 men in Group 1 and they had a mean of 7 and a standard deviation of 2.5, while the 35 men in Group 2 had a mean of 5 and a standard deviation of 1.4, what is the approximate value of using the t-test?

An estimate of the standard error for a t-test of independent means that assumes that the variances of both groups are equal is called the:

In an independent samples t-test, when the significant value of Levene's test for equality of variances is ___________ the variances of the two samples are assumed to be unequal.

In an analysis of variance, the systematic variation of scores between the groups is due to individual differences.

In an analysis of variance, the F-ratio is calculated by:

A one-way ANOVA is a multivariate statistical analysis technique.

A researcher wishes to compare the average number of product sales between stores in Melbourne, Sydney and Brisbane. To examine this, an appropriate statistical test would be a(n) :

A new range of Fat Yak Ale is test marketed in three different pubs. One pub sells the ale at $9.00, the second pub sells it at $8.50 and the third pub sells it at $8.00. The researcher would like to test the extent to which sales differ between each of these price points. To examine this, an appropriate statistical test would be a(n) :

In the independent samples t-test, to determine if the variances of the two samples are equal:

A researcher measures brand awareness prior to and after an advertising campaign of a single panel of consumers. A paired samples t-test would be appropriate to test if there is a statistically significant change in brand awareness.

The paired-samples t-test is used to compare the means of two independent groups to see if they are significantly different from one another.