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7th grade · Math · Unit 11 of 20

Mean, Median & Mode

What is typical?

What your child practices

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

New York State Learning Standards learning standard: NY-7.SP.3; NY-7.SP.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 New York

In the New York State Learning Standards, this is unit 11 of 20 in 7th grade Math, after Dependent Events and before Center & Spread.

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: New York State Education Department (NYSED)

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 26, 52, 12, 40, 11?

    • 41
    • 36
    • 39

  2. Question 2

    What is the mode of 6, 11, 6, 2, 12, 4?

    • 4
    • 2
    • 6

  3. Question 3

    What is the mean of 7, 8, 9, 12?

    • 3
    • 9
    • 10

  4. Question 4

    What is the median of 10, 11, 7, 12, 3?

    • 0
    • 6
    • 10

  5. Question 5

    What is the median of 20, 18, 3, 3, 2?

    • 3
    • 6
    • 4

  6. Question 6

    The data 13, 14, 15, 16, 17 get one more value: 85. Which measure changes the most?

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

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