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7th grade · Math · Unit 11 of 16

Mean, Median & Mode

What is typical?

What your child practices

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

Arizona Academic Standards learning standard: 7.SP.B.3; 7.SP.B.4 · 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 Arizona

In the Arizona Academic Standards, this is unit 11 of 16 in 7th grade Math, after Algebra Moves 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: Arizona Department of Education

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

    What is the range of 9, 28, 57, 30, 21?

    • 42
    • 48
    • 46

  2. Question 2

    What is the median of 5, 18, 9, 7, 3, 12?

    • 14
    • 8
    • 7

  3. Question 3

    What is the median of 6, 2, 20, 10, 6, 12?

    • 8
    • 11
    • 6

  4. Question 4

    What is the mean of 14, 14, 5, 6, 6?

    • 9
    • 10
    • 13

  5. Question 5

    Which value is an outlier in 12, 17, 11, 18, 72, 10?

    • 11
    • 10
    • 12
    • 72

  6. Question 6

    What is the mean of 19, 14, 20, 5, 22?

    • 21
    • 11
    • 16

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