Mean and Median Check for Understanding 0506 5

Mean and Median Check for Understanding 0506. 5. 6

MEAN • The mean is a synonym for average.

MEAN • To find the mean (average) of a group of numbers the first step is to add all of the numbers. Example: 4, 10, 3, 7, 2, 10 4 + 10 + 3 + 7 + 2 + 10 = 36

MEAN • After you have added all of the numbers, the next step is to divide the sum by the total number of addends. • Example: 36/6 = 6 • Mean = 6

MEAN • Note: sometimes, you do not get a whole number.

MEAN • Now, you try one! • 7, 9, 11, 6, 13, 6, 6, 3, 11 • What is the first step?

MEAN • 7 + 9 + 11 + 6 + 13 + 6 + 3 + 11 = 72 • What is the next step?

MEAN • Divide • 72/9 = 8 • Mean = 8 • Now, let’s try 1 more!

MEAN • Find the mean for this group of numbers. • 11, 10, 24, 16, 14

MEAN • 11 + 10 + 24 + 16 + 14 = 75

MEAN • 75/5 = 15 • Mean = 15

MEDIAN • The median is the middle number or value. • To find the median the first step is to put the numbers in order from least to greatest.

MEDIAN • The number in the middle of the list is the median.

MEDIAN • 4, 23, 16, 17, 6, 10, 20 • Put the numbers in order from least to greatest.

MEDIAN • 4, 6, 10, • Median = 16, 17, 20, 16 23

MEDIAN • Now you try one! • What is the median of 5, 11, 23, 9, 10

MEDIAN • 5, 9, 10, • Median = 10 11, 23

MEDIAN • 6, 3, 7, 6, 11, 13, 6, 11, 9 • Put the numbers in order from least to greatest.

MEDIAN • 3, 6, 6, 6, • Median = 7, 9, 11, 7 11, 13

MEDIAN • If there are two middle values, the median is halfway between them.

MEDIAN • 13, 7, 6, 8, 6, 3, 11, 6, 11, 9 • Put the numbers in order

MEDIAN • 3, 6, 6, 6, 7, 8, 9, 11, 13 • There are two middle numbers or values, 7 and 8. The median is halfway between 7 and 8. The median is 7 ½ or 7. 5.