11. What is the definition of descriptive statistics?
Descriptive statistics summarize and describe data sets.
22. Define inferential statistics.
Inferential statistics draw conclusions or make predictions about a population based on sample data.
33. What is a population in statistics?
A population is the entire group of individuals or items about which information is desired.
44. Define a sample in statistics.
A sample is a subset of the population that is studied in order to make inferences about the population.
55. What is the purpose of a frequency distribution table?
A frequency distribution table organizes data into categories and shows the number of observations in each category.
66. Define central tendency in statistics.
Central tendency refers to the tendency of data to cluster around a central value.
77. What are the measures of central tendency commonly used?
The measures of central tendency include the mean, median, and mode.
88. Describe the mean in statistics.
The mean is the average of a set of numbers calculated by dividing the sum of the numbers by the count of numbers.
99. What is the median of a data set?
The median is the middle value in a sorted, ascending or descending, list of numbers.
1010. Define the mode in statistics.
The mode is the value that appears most frequently in a data set.
1111. What is a histogram?
A histogram is a graphical representation of a frequency distribution in which rectangles are used to represent the frequencies of data values.
1212. Define a normal distribution.
A normal distribution is a bell-shaped distribution of data where the mean, median, and mode are equal and symmetrically distributed around the mean.
1313. What is standard deviation?
Standard deviation measures the amount of variation or dispersion of a set of values.
1414. Describe correlation in statistics.
Correlation measures the strength and direction of the relationship between two variables.
15What is regression analysis used for?
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.