Mean, Median, Mode and Range

What is the median of this data set?

10 , 15 , 33 , 159

Answer explanation

When you have two numbers in the middle, add them and divide by 2 to find the median.

Find the mean of the following numbers:

40, 45, 32, 79, 57, 50, 40

Answer explanation

To find the mean (average), add the numbers and divide by the number of numbers.

The mean of 8 numbers is 11. What is the total of all 8 numbers?

Answer explanation

Multiply the mean by the number of numbers to get the total.

What is the range of the following numbers?

1, 2, 4, 3, 3, 2, 2, 3, 3, 2, 2, 2, 2, 2, 2, 5, 2

Answer explanation

To find the range, subtract the smallest number from the largest number.

The distribution of this data set can best be described as...

• Right-skewed

• Left-skewed

• Symmetrical

• Stinky

Answer explanation

The tail is on the left, so it is left-skewed.

Find the median.
12, 5, 9, 18, 22, 25, 5

• 9

• 8

• 12

• 18

Find the mode.
12, 5, 9, 18, 22, 25, 5

• 22

• 18

• 9

• 5

Find the mean.
90, 100, 95, 85, 60, 80

• 85

• 84

• 86

• 90

Find the range.
12, 5, 9, 18, 22, 25, 5

• 20

• 15

• 22

• 18

Range measures what?

• Center

• Cuteness

• Variability

• Weight