Chapter 4: Descriptive Statistics

Question 1

Descriptive Statistics

Answer 1

Describe the data in the study.

Question 2

Frequencies

Answer 2

Used to describe how often something occurs.

Question 3

Frequency Distribution

Answer 3

The count indicates how often something occurs within a given interval.

Question 4

Histogram

Answer 4

a bar graph where the vertical (y) axis identifies the frequency a score occurs and the horizontal (x) axis presents the score value.

Question 5

Mean

Answer 5

Is the average of the distribution; balancing scores above and below it.

Question 6

Measures of Central Tendency

Answer 6

Location of the center of a distribution, common measures being mode, mean, and median.

Question 7

Median

Answer 7

It is the value if the score exactly in the middle of the distribution.

Question 8

Mode

Answer 8

Score value that occurs most frequently in a distribution.

Question 9

Normal Distribution

Answer 9

The data points are distributed in a symmetrical, bell-shaped curve.

Question 10

Range

Answer 10

One measure of variability that indicates the lowest and highest scores.

Question 11

Skewed Distribution

Answer 11

There is a lack of symmetry in the score spread.

Question 12

Standard Deviation

Answer 12

A common measure of variability where the expression of the amount of spread in the frequency distribution and the average amt of deviation in which each individual score varies from the mean.

Question 13

Standard Error of the Mean (SEM)

Answer 13

An estimate of the standard deviations of multiple samples.

Question 14

Variability

Answer 14

Spread of scores in a distribution.

Question 15

M, x

Answer 15

Mean of a sample

Question 16

M (sd)

Answer 16

Mean & standard deviation of a sample

Question 17

s, sd

Answer 17

The standard deviation of a sample

Question 18

s2

Answer 18

Variance of a sample

Question 19

N, n

Answer 19

of participants in a study OR
# of participants in a group study