Math Review: Mean, Median, Mode

What is the definition of mean?

• The number(s) that appears most often in a data set

• The average of a data set

• The number in the middle of a data set

• I'm not sure

{ 8, 3, 5, 2 }

What is the mean of this data set?

• None

• 3

• 4

• 4.5

• I'm not sure

Answer explanation

First, ADD all the numbers together.

Then, DIVIDE by how many numbers were listed.

{ 2, 5, 7, 1, 10 }

What is the mean of this data set?

• 1

• 3

• 5

• 7

• 10

{ 2, 2, 5, 6, 9, 12, 13 }

What is the mean of this data set?

• 1

• 2

• 6

• 7

• 9

What is the definition of median?

• I'm not sure

• The average of a data set

• The number(s) that appear most often in a data set

• The middle number in a data set

{ 0, 1, 2, 3, 4 }

What is the median of this data set?

• 0

• 1

• 2

• 3

• 4

{ 3, 7, 4, 6, 5 }

What is the median of this data set?

• 3

• 4

• 5

• 6

• 7

Answer explanation

Remember to make sure your data set is in numerical order from least to greatest to get the correct answer when looking for the median.

{2, 5, 7, 6}

What is the median of this data set?

• 2

• 5.5

• 2.5

• 6.5

What is the definition of mode?

• The average of a data set

• The middle number of a data set

• The number(s) that appears most often in a data set

• I'm not sure

{ 1, 3, 5, 7, 5, 1 }

What is the mode of this data set?

• 7

• 1

• 5

• 1 and 5

• 3