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7th grade · Math · Unit 12 of 18

Mean, Median & Mode

What is typical?

What your child practices

Mean, median, mode and range, and how an outlier changes them.

Alabama Course of Study content standard: 7.11; 7.12 · comparing two data sets with measures of center and variability

How we explain it

Children can open this short lesson before they practice.

  1. Mean: add the values and divide by how many there are.
  2. Median: the middle value when the data is in order. Mode: the most common value.
  3. An outlier is a value far from the rest. It pulls the mean most.

Example: Find the median of 3, 9, 5, 7, 4. Put in order: 3, 4, 5, 7, 9. The middle value is 5. Answer: 5

Mean, Median & Mode in Alabama

In the Alabama Course of Study, this is unit 12 of 18 in 7th grade Math, after Dependent Events and before Multiply & Divide Signed Numbers.

Gradelings describes a child's practice on this unit as Beginning, Approaching, Meeting or Exceeding (Four practice steps). That reflects practice, not a report-card mark: the teacher decides the mark.

Source: Alabama State Department of Education (ALSDE)

Sample questions

A taste of this unit. In the app, questions change every time and get easier or harder to match your child.

  1. Question 1

    The data 11, 13, 15, 16, 17 get one more value: 85. Which measure changes the most?

    • The mode
    • The median
    • The mean
    • They all change the same amount

  2. Question 2

    What is the range of 13, 17, 22, 9, 48?

    • 41
    • 33
    • 39

  3. Question 3

    What is the mean of 13, 14, 20, 9, 19?

    • 12
    • 21
    • 15

  4. Question 4

    What is the median of 17, 9, 12, 2, 4, 11?

    • 4
    • 10
    • 20

  5. Question 5

    What is the mode of 13, 3, 10, 7, 10, 9?

    • 12
    • 10
    • 9

  6. Question 6

    What is the mean of 15, 16, 5, 20, 9?

    • 11
    • 15
    • 13

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