Measures of Center

Front

What is the range?

Back

The range is the difference between the biggest and smallest values in a set of numbers.

Front

Find the range: 7, 1, 1, 7, 1, 4, 1

Back

6

Front

What is the median?

Back

The median is the middle number in a sorted list of numbers.

Front

Find the median: 3, 5, 7, 9, 11, 8, 3

Back

7

Front

What is the mode?

Back

The mode is the number that occurs the most in a set of numbers.

Front

Find the mode: 3, 5, 7, 9, 11, 8, 3

Back

3

Front

What is the average?

Back

The average is the sum of all values divided by the number of values.

Front

Paulo got these grades in three tests: 72, 80, and 82. He wants an average of 80 for four tests. What mark must he get in the fourth test?

Back

86

Front

What is the formula for calculating the average?

Back

Average = (Sum of all values) / (Number of values)

Front

Find the range: 3, 5, 7, 9, 11, 8, 3

Back

8