The average of all of the values in a set
Add up all of the values and divide by the total number of values
Use when the data set has no outliers
Find the mean of the data set:
2, 8, 7, 3, 4, 6,
Find the mean of the data set:
3, 5, 7, 2, 3, 1, 9, 10
The middle value, or average of the two middle values, of a data set
Order the values from least to greatest, then find the middle value
Use when the data has outliers
Find the median:
4, 6, 7, 9, 5, 3, 7, 5, 22, 2
Find the median:
15, 17, 19, 22, 24, 11
The value that occurs the most
Not every set has a mode
Find the mode:
88, 85, 87, 99, 88, 96, 47, 88
Find the mode:
25, 28, 29, 24, 27, 29, 31
The difference between the least value and the greatest
Subtract the least value from the greatest
Find the range:
57, 64, 78, 33, 55, 63
Determine the best measure of central tendency to use:
11, 13, 15, 27, 14, 18, 19, 12, 16
Determine the best measure of central tendency:
35, 33, 37, 32, 33, 36, 32, 34
9-3
