Mean, Median, Mode Lesson

Mean, Median, Mode Lesson

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Mean, Median, Mode

Let's define some words first.

Take notes!

Open Ended

Define in your own words what Mean is.

Open Ended

Define in your own words what Median is.

Open Ended

Define in your own words what Mode is.

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

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

• Example: 1,2,3,4,4,5

• Median would be 3+4 (7) divide by 2 = 3.5

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

Range

• Tells us how spread out the data is

• Subtract the smallest number from the largest number

• Example: 1,3,4,5,5,8

• Range would be 8-1 = 7

Multiple Choice

What is the definition of the mean?

• The average
• The middle number
• The difference between the highest and lowest numbers
• The number that occurs the most

Multiple Choice

When finding the median, what do you do if there are two middle numbers?

• Add them together and divide by 2
• Write them both as the answer
• Give up
• Pick one

Multiple Choice

The range is found by finding the _______________ number and subtracting the ________________ number.

• smallest, biggest

• even, odd

• biggest, smallest

• middle, first

Multiple Choice

The mode is the number ________________________.

• you see most

• you see least

• you don't see

• you see first

Remember, the first thing you want to do is order your numbers least to greatest.

1, 4, 6, 9, 12, 22

Multiple Choice

Find the mean:
28, 18, 19, 18, 17

• 20
• 18
• 11
• 19

Multiple Choice

Calculate the mean.

10, 4, 5, 9

• 7

• 5

• 8

• 4

Multiple Choice

Calculate the mean.

16, 5, 7, 12

• 9

• 6

• 12

• 10

Multiple Choice

Find the median:
3, 5, 7, 4, 3, 1

• 3 and 4
• There isn't one
• 3.5
• 3

Multiple Choice

When finding the median, what do you do if there are two middle numbers?

• Add them together and divide by 2
• Write them both as the answer
• Give up
• Pick one

Multiple Choice

93, 100, 82, 93, 67, 100, 67, 82, 93, 93
What is the mode of this data set?

• 26
• 93
• 33
• 82

Multiple Choice

The mode is the number ________________________.

• you see most

• you see least

• you don't see

• you see first