MATH 115 Unit 1 Test Information Flashcard

Front

What is a key in a plot?

Back

A key (or legend) explains the symbols, colors, or patterns used in a plot to represent different data sets.

Front

What is standard deviation?

Back

Standard deviation is a measure of the amount of variation or dispersion in a set of values.

Front

How do you calculate variance from standard deviation?

Back

Variance is the square of the standard deviation. If the standard deviation is 3.5, the variance is 3.5^2 = 12.25.

Front

What does it mean if data is skewed right?

Back

If data is skewed right, it means that the tail on the right side of the distribution is longer or fatter than the left side.

Front

What is a uniform distribution?

Back

A uniform distribution is a type of distribution in which all outcomes are equally likely.

Front

What is the population in a study?

Back

The population is the entire group of individuals or instances about whom we hope to learn.

Front

What is a sample in statistics?

Back

A sample is a subset of the population that is used to represent the entire group.

Front

What is the difference between population and sample?

Back

A population includes all members of a specified group, while a sample includes only a portion of that group.

Front

What is a bimodal distribution?

Back

A bimodal distribution has two different modes, which can appear as two peaks in the frequency distribution.

Front

What does it mean for data to be mound-shaped?

Back

Mound-shaped data is symmetrical and has a single peak, resembling a bell curve.