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Central Tendency
Variability
Frequency Distributions
Scales of Measurement
Fun Facts
100
The most frequently occurring number.
What is the mode?
100
A crude and imprecise measure of variability.
What is the range?
100
This type of graph requires numeric scores (interval or ratio)
What is a histogram?
100

A scale with equally spaced values that and an arbitrary zero point.

What is the interval scale?

100
When scores in a distribution taper off to the right.
What is a positively skewed distribution?
200
The sum of all scores divided by the total number of scores.
What is the mean?
200
Variability.
What is the measure of the standard or average distance from the mean?
200
It uses dots instead of bars to represent the frequency.
What is a frequency polygon?
200

First, second, and last are categories in this kind of scale.

What is an ordinal scale?

200
A value for a population and a value for a sample.
What are parameters and statistics?
300
The number 7 in the following distribution: 7 1 9 3 4 10 8
What is the median?
300
The value that is obtained by squaring all deviation scores.
What is the sum of squares?
300
This is used with non-numerical scores.
What is a bar graph?
300

A nominal scale.

What has non-ordered category responses.

300
Allows you to study samples to make generalizations about the population.
What are inferential statistics?
400
The value used when your distribution contains outliers.
What is the median?
400
The difference between the population and sample formulas for standard deviation.
What is the value in the denominator is n-1 for a sample?
400
In the first case, the bars touch while in the second case, the bars are separated.
What is the difference between a histogram and a bar graph?
400

Scores on an exam constitute this type of scale.

What is ratio?

400
Sampling error
What is the difference that exists between the sample and the population?
500
Looking forward to inferential statistics, this value captures the between group differences.
What is the mean?
500
This obscures patterns in the data.
What is the problem with scores that have high variability?
500
A graph that is used when the population is large and not all members can be represented.
What is a graph based on relative frequency?
500

The reason we care about scales of measurement.

What is they help us determine which statistical analysis to use?

500
Real limits.
What are the boundaries of each interval representing scores measured on a continuous number line?