Skip to lesson

Choose “Save as PDF” in the print dialog to keep a copy.

Cogito

Grade 6 Math · Chapter 9 · Lesson 4

Practice Worksheet

Mean, Median, and Which to Trust

One outlier can drag an average anywhere.

10 problems · about 19 minutes · 6.SP.A.3, 6.SP.B.5

NameDate

Figure — use these to answer the problems

Change how many sit above each value and watch the middle move.
123456
Value
How many 2s1
How many 3s1
How many 4s2
How many 5s1
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

3 problems

  1. From “Dot Plots and Histograms”

    Bars of 2, 5 and 6. How many values in all?

    Answer

  2. From “Centre and Spread”

    What is the mean of 6, 8, and 13?

    Answer

  3. From “What Makes a Question Statistical”

    Is "How many siblings does each child in the club have?" statistical?

    • Yes.
    • No.

Warm Up

Straightforward practice. Get the method working first.

3 problems

  1. Median of 2, 4, 6, 8 and 90?

    Answer

  2. Mean of 3, 5 and 7?

    Answer

  3. Median of 1, 2, 3, 4 and 100?

    Answer

Build It Up

The same ideas with more to keep track of.

2 problems

  1. Mean of 1, 2, 3, 4 and 100?

    Answer

  2. Which better describes 1, 2, 3, 4 and 100?

    • The median.
    • The mean.

Stretch Yourself

Mixed problems. Work out what kind of question it is before you start.

2 problems

  1. The Test Scores

    Scores 4, 6, 8, 10 and 12. What is the mean?

    Answer

  2. The Middle

    Scores 4, 6, 8, 10 and 12. What is the median?

    Answer