Statistics

Descriptive statistics summarize and describe data sets.

Inferential statistics draw conclusions or make predictions about a population based on sample data.

A population is the entire group of individuals or items about which information is desired.

A sample is a subset of the population that is studied in order to make inferences about the population.

A frequency distribution table organizes data into categories and shows the number of observations in each category.

Central tendency refers to the tendency of data to cluster around a central value.

The measures of central tendency include the mean, median, and mode.

The mean is the average of a set of numbers calculated by dividing the sum of the numbers by the count of numbers.

The median is the middle value in a sorted, ascending or descending, list of numbers.

The mode is the value that appears most frequently in a data set.

A histogram is a graphical representation of a frequency distribution in which rectangles are used to represent the frequencies of data values.

A normal distribution is a bell-shaped distribution of data where the mean, median, and mode are equal and symmetrically distributed around the mean.

Standard deviation measures the amount of variation or dispersion of a set of values.

Correlation measures the strength and direction of the relationship between two variables.

Regression analysis is used to examine the relationship between one dependent variable and one or more independent variables.

These flashcards cover essential concepts from the field of statistics relevant to the WGU Health Allied Statistics Objective Assessment.