Descriptive Statistics

Which BEST describes a data set?

All raw scores make up a data set.

A data set with two modes is called a

bimodal distribution

The _____ is the difference between the highest and lowest scores in a distribution

range

What are two common measures of variability?

range and standard deviation

In the following data set, what is the mode? 3, 7, 8, 4, 4, 5, 9, 10, 6, 2

4

In the following data set, what is the median? 3, 7, 8, 4, 4, 5, 9, 10, 6, 2

5.5

In the following data set, what is the range? 3, 7, 8, 4, 4, 5, 9, 10, 6, 2

8

Measures of _____ describe the scores in the middle of a distribution

central tendency

The mean, median, and mode are all measures of:

central tendency

. What are two types of measures numbers can be grouped into?

central tendency and variability

What is the singular word for data

datum

A _____ allows researchers to display how many times each score occurs.

frequency histogram

A graph that contains single points that are connected with a line is called a

frequency polygon

The average score is also called the

mean

In a skewed distribution, which is the BEST measure of central tendency to use

median

The _____ is the score that is located in the middle of all scores

median

The _____ is the score that occurs most often in a data set.

mode

A _____ distribution is symmetrical and has a bell shaped curve

normal

In a _____ distribution, the mean, median, and mode are all the same number.

normal

Measures of _____ describe whether the values in a data set are spread out or clumped together.

variability