Stats MD

Front

What is a categorical variable?

Back

A variable that can take on one of a limited, and usually fixed, number of possible values, assigning each individual or other unit of observation to a particular group or nominal category.

Front

What is a discrete variable?

Back

A type of variable that can take on a countable number of values, often whole numbers, and does not make sense with decimals.

Front

What is a continuous variable?

Back

A variable that can take on an infinite number of values within a given range, including fractions and decimals.

Front

What does it mean for data to be skewed right?

Back

It means that the tail on the right side of the distribution is longer or fatter than the left side, indicating that there are a number of unusually high values.

Front

What is a stem-and-leaf plot?

Back

A graphical method used to display quantitative data in a way that retains the original data values while showing the shape of the distribution.

Front

In a stem-and-leaf plot, what does the 'stem' represent?

Back

The stem represents the first digit(s) of the data values.

Front

In a stem-and-leaf plot, what does the 'leaf' represent?

Back

The leaf represents the last digit(s) of the data values.

Front

What is statistics?

Back

The collection, organization, analysis, interpretation, and presentation of data.

Front

What is the purpose of averaging in statistics?

Back

To summarize a set of data points with a single value that represents the central tendency of the data.

Front

What is the difference between descriptive and inferential statistics?

Back

Descriptive statistics summarize and describe the features of a dataset, while inferential statistics use a random sample of data to make inferences about a larger population.