Mean, Median, Mode, & Range

Mean, Median, Mode, & Range

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Mean

• Tells you the central tendency of a data set

• Also called the average

• Add together all of the numbers, then divide by the number of numbers

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Example: 3, 5, 5, 6, 6, 6, 7, 11​

Median

• The middle number in a data set

• Order all of the numbers from least to greatest

• If there is an odd number of numbers, find the middle number

• If there is an even number of numbers, find the mean of the two middle numbers

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Example: 3, 5, 5, 6, 6, 6, 7, 11​​

Mode

• Tells us which number occurs most often

• Find the number that repeats the most in the data set

• There can be more than one mode if multiple numbers repeat the same number of times

• There can be no mode if none of the numbers repeat

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Example: 3, 5, 5, 6, 6, 6, 7, 11​​

Range

• Tells us how spread out the data is

• Subtract the smallest number from the largest number

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Example: 3, 5, 5, 6, 6, 6, 7, 11​

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Multiple Choice

What is the range?

• The number in the middle

• the biggest number MINUS the smallest number

• The number that appears most often

Multiple Choice

What is the median?

• The number in the middle when the numbers are in order from least to greatest.

• The average

• The number that appears most often.

Multiple Choice

What is the mode?

• The average

• The number that appears most often.

• The number in the middle.

Multiple Choice

To find the average, or mean, of a set of numbers, add up all the numbers and divide by...

• The number of items in the set.

• The smallest number

• The largest number

Multiple Choice

A data set can have more than one mode

• True

• False

Multiple Choice

When you are finding the MEDIAN and 2 numbers are in the middle, what do you do?

• List both of the numbers as the Median.

• Add the two numbers together and divide by 2.

• Pick the one that you want.

Multiple Choice

Roger bowled 7 games last weekend.

His scores are: 127, 138, 142, 155, 165, 172, and 193.

What is the range of Roger's scores?

• 193

• 127

• 66

Multiple Choice

The mode score on a test was 94!

Which is true?

• 99 was the highest score

• More students received a 94 than any other score

• No one scored below 50

Multiple Choice

The number of miles Jenna ran each week is shown:

28, 31, 36, 36, 42, 48, 52

What is the median number of miles Jenna ran?

• 24

• 39

• 36

Multiple Choice

To find the median, you must put the data in order from least to greatest first.

• True

• False

Multiple Choice

Dr. Dre is a dentist.

He must report on the average (mean) number of cavities his patients have.

1, 0, 1, 5, 0, 3, 4

What is the average number of cavities?

• 1

• 2

• 7

Multiple Choice

At Donald's Donuts, the number of donut holes in a bag can vary.

Help Donald find the MODE.

12, 10, 10, 10, 13, 12, 11, 13, 10

• 10

• 12

• No mode

Multiple Choice

The heights of some students are given in centimeters.

158, 159, 164, 164, 167, 172

What is the RANGE of the heights?

• 16 cm

• 158 cm

• 14 cm

Multiple Choice

What is the MEDIAN of this set of data?

10, 20, 30, 40, 50, 60, 70, 80, 90, 100

• 50

• 60

• 55

Multiple Choice

Mode:
67, 74, 95, 98, 98, 99, 102

• 90.4
• 35
• 92
• 98

Multiple Choice

Median:
67, 74, 95, 98, 98, 99, 102

• 102
• 67
• 98
• 90.4

Multiple Choice

Mean:
67, 74, 95, 98, 98, 99, 102

• 90.4
• 633
• 98
• 92.3

Multiple Choice

Range:
67, 74, 95, 98, 98, 99, 102

• 102
• 67
• 98
• 35

Multiple Choice

In order to find the median, the data must be sorted from least to greatest first.

• True
• False

Multiple Choice

Find the median of these numbers:
4,2,7,4,3

• 2
• 5
• 7
• 4

Multiple Choice

Ervin bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is the range of Ervin's scores?

• 193

• 127

• 60

• 66