JOUR 382 Final

Predictive validity means that a measure predicts “real world” outcomes.

True

False

�Age: __ 0–4 __ 5–9 __ 10–14 __ 15–19” is an example of what kind of scale?

Nominal

Ordinal

Interval

Ratio

The secret to high intercoder or observer reliability is -

thorough training of observers

clear definitions and classifications of observed behaviors

random selection of observers

(a) and (b) only

The chi-square test is used to assess whether groups differ on which of the following types of variable?

Interval and ratio

linear and curvilinear

Bivariate and univariate

nominal and ordinal

Under a normal curve, 68% of the values occur -

Plus or minus one standard deviation from the mean

Plus or minus two standard deviations from the mean.

Plus or minus three standard deviations from the mean.

Plus or minus four standard deviations from the mean.

Under a normal curve, 95% of the values occur

Plus or minus one standard deviation from the mean

Plus or minus two standard deviations from the mean.

Plus or minus three standard deviations from the mean.

Plus or minus four standard deviations from the mean.

Under a normal curve, 99.7% of the values occur -

Plus or minus one standard deviation from the mean

Plus or minus two standard deviations from the mean.

Plus or minus three standard deviations from the mean.

Plus or minus four standard deviations from the mean.

Correlation coefficients indicate the –

direction of the relationship between two variables

strength of the relationship between two variables

Strength of the relationships among three or more variables

Value of one variable given the value of another

The t-test compares the -

mean number of variables in two different groups

Mean number of individuals in two different groups

Distribution of scores in two different groups

Mean scores on one variable in two different groups

Interpreting a t value requires that we also compute a number known as the –

Degrees of meanness

degrees of variance

Degrees of randomness

Degrees of freedom

The t-test is used to assess whether groups differ on which of the following types of variable?

bivariate and univariate

Interval and ratio.

Nominal and ordinal.

Linear and curvilinear

T – test compares -

the strength of relationship between variables.

The mean scores from two groups on the same variable.

The distribution of data from two groups.

Nothing!

Chi-square test compares

Anything!

The mean scores from two groups on the same variable.

The distribution of data from two groups.

The strength of relationship between variables.

Correlation compares -

the mean scores from two groups on the same variable.

The distribution of data from two groups.

The strength of relationship between variables.

All!

What two things govern the size of your sample if you want to generalize from the sample to a wider population?

homogeneity of the population and size of the population

What two things govern the size of your sample if you want to generalize from the sample to a wider population?

Homogeneity of the population and level of error you are prepared to live with

The sampling interval and homogeneity of the population

Surveys that collect data at only one point in time are referred to as ____ studies.

trend

Cross-sectional

Panel

Cohort

Which of the following experimental designs has a control group?

Field experiment

Two-group pre-test, post-test design

One-group pre-test, post-test design

Ex post facto design

Experimental designs that manipulate three or more variables are referred to as -

monovariate designs

Bivariate designs

Manipulated designs

Factorial designs

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