Appendix B Measures of Central Tendency Flashcards
What is a common use of descriptive statistics?
To summarize a collection of data with a single number that represents the entire data set.
What are measures of central tendency?
Measures such as the mean, median, and mode that summarize a data set.
How do you calculate the mean of a data set?
Total the numbers in the data set and divide by the total number of numbers.
What is the formula for the mean?
μ = ΣX / N, where μ is the mean, Σ represents the sum of values, X represents the values in the data set, and N is the number of observations.
What is the median?
The midpoint or middle in an ordered set of data.
How is the median calculated when the number of observations is even?
Take the average of the two middle numbers in the ordered data set.
What is the mode?
The most frequently occurring score or observation in a data set.
