Ch 2 and 3: Variability and Measurement

Ch 2 and 3: Variability and Measurement

University

10 Qs

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Ch 2 and 3: Variability and Measurement

Ch 2 and 3: Variability and Measurement

Assessment

Quiz

Other

University

Hard

Created by

Deana Vitrano

Used 3+ times

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10 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 5 pts

As a concept, variance can best be described as

an average of all the values in a dataset
the sum of the squared deviations
a measure of how loosely a set of scores clusters around the mean
a measure of frequency

2.

MULTIPLE CHOICE QUESTION

1 min • 5 pts

In an experiment, which of the following does not contribute to error variance?

The personalities of the participants
The variable of interest
The weather
Random equipment malfunctions

3.

MULTIPLE CHOICE QUESTION

1 min • 5 pts

In an experiment on aggression, the researcher was interested in how different temperatures affect levels of aggression in participants. In this particular study, systematic variance would be caused by

error variance
participants’ current levels of stress
different temperatures
a mistake in the research design

4.

MULTIPLE CHOICE QUESTION

1 min • 5 pts

Which of the following statements about interval and ratio scales is true?

both interval and ratio scales have an absolute zero
neither interval nor ratio scales have an absolute zero
interval scales have an absolute zero, but ratio scales do not
ratio scales have an absolute zero, but interval scales do not

5.

MULTIPLE CHOICE QUESTION

1 min • 5 pts

Which of these is an example of a nominal variable? 

Child's height (in inches)

Number of computers in the room

Whether or not a student owns a MacBook (yes or no)

Time to complete a task (in minutes)

6.

MULTIPLE CHOICE QUESTION

1 min • 5 pts

Which of the following is true about test-retest reliability? 

It measures how related the items on a test are
It can only be done with measures that should remain the same over time
It can only be done when you have two or more raters observing participant behavior
It measures how valid the items on a test are

7.

MULTIPLE CHOICE QUESTION

1 min • 5 pts

When testing test-retest reliability, researchers generally want two administrations of the same test to….

correlate at least .05.
correlate at least .50.
correlate at least .70.
correlate 1.00.

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