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- Final Exam - Multiple Choice

Jillian K.

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80
If a two-factor analysis of variance produces a statistically significant interaction, then you can conclude that...

the significance of the main effects is NOT related to the significance of the interaction.

The average verbal SAT score for the entire class of entering freshmen is 530. However, if you select a sample of 20 freshmen and compute their average verbal SAT score you probably will not get exactly 530. What statistical concept is used to explain the natural difference that exists between a sample mean and the corresponding population mean?

Sampling Error

What is the mean for the following sample of scores?

Scores: 1, 2, 5, 4

M = 3

A positive value for a correlation indicates...

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

As the sample size gets larger, the size of the correlation necessary for significance...

gets smaller.

The distribution of sample means (for a specific sample size) consists of...

the sample means for all the possible samples (for the specific sample size)

What is the value of (ΣX)² for the follwing scores?

Scores: 3, 0, 5, 2

The value of the Pearson Correlation will be negative if...

In analysis of variance, the F-ratio is a ratio of...

What is the median for the following set of scores?

Scores: 1, 2, 5, 6, 17

In general the distribution of F-ratios is...

For a population with μ = 80 and σ = 10, what is the z-score corresponding to X = 95?

The symbol for SS stands for...

In analysis of variance, each independent variable is referred to as a...

The Pearson Correlation measures...

In a normal distribution...

As a sample size increases...

Which of the following describes the typical chi-square distribution?

Under what circumstances are post hoc tests necessary?

A sample of n = 5 scores has M = 20 and s² = 4. What is the sample standard deviation?

In analysis of variance, the term factor refers to...

A negative value for a correlation indicates...

In analysis of variance, *MS *provides a measure of...

The analysis of variance for a two-factor experiment produces...

For any distribution, what is the z-score corresponding to the mean?

A z-score of z = -2.00 indicates a position in a distribution...

Which set of test scores has the smallest standard deviation?

A. 11, 17, 31, 53

B. 5, 11, 42, 22

C. 145, 143, 145, 147

D. 27, 105, 10, 80

The numerical value for a correlation...

A two-factor experimental study means that the study has...

For which of the following situations would a repeated-measures research design be appropriate?

A. Comparing verbal skills for girls vs. boys at age 3

B. Comparing pain tolerance before and after taking a new pain medication

C. Comparing self-esteem for students who participate in school athletics vs. those who do not

D. Comparing problem solving skills for science majors versus art majors at a college.

The null hypothesis for an ANOVA states that...

If other factors are held constant, the standard error of *M* will _____ as the sample size increases.

A two-factor experiment means that the experiment design includes...

The purpose for the post hoc tests is...

For an extremely skewed distribution of scores, the best measure of central tendency would be...

Real limits are an important consideration when measuring a ______ variable.

Which of the following Pearson Correlations shows the greatest strength or consistency of relationship?

A. -0.90

B. +0.74

C. +0.85

D. -0.33

Which of the following symbols identifies the sample standard deviation?

In a two-factor analysis of variance, a main effect is defined as...

A sample of n = 20 scores is transformed into z-scores. The mean for the 20 z-scores is...

By selecting a smaller alpha level, a reasearcher is...

What does it mean to obtain a negative value for the chi-square statistic?

Scores from a statistics exam are reported as deviations scores. Which of the following deviation scores indicates a higher position in the class distribution?

A. +8

B. 0

C. -8

D. cannot determine without more information

The z-score boundaries for the critical region are determined by...

In an experiment, the researcher manipulates the _______ and measures changes in the ________.

In a two-factor ANOVA, what is the implication of a significant A x B interaction?

In an experiment, the researcher manipulates the _______ and measures changes in the ________.

In a two-factor ANOVA, what is the implication of a significant A x B interaction?

Two variables are said to interact when...

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