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Cogito

Grade 8 Math · Chapter 10 · Lesson 3

Practice Worksheet

Two-Way Tables

Two categories at once.

10 problems · about 19 minutes · 8.SP.A.4

NameDate

Figure — use these to answer the problems

Set the counts in each group and compare them.
Walk8
Bus4
Walk8
Bus4
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

3 problems

  1. From “The Line of Best Fit”

    y = 5x + 2. What is y at x = 3?

    Answer

  2. From “Scatter Plots and Association”

    Fitted line y = 2x + 3. Predict for x = 6.

    Answer

  3. From “Volume of Cones, Cylinders, and Spheres”

    A cylinder holds 210. Its matching cone holds?

    Answer

Warm Up

Straightforward practice. Get the method working first.

3 problems

  1. 18 out of 24. What percent?

    Answer

  2. A row has 7 and 13. Row total?

    Answer

  3. 20 out of 50. What percent?

    Answer

Build It Up

The same ideas with more to keep track of.

2 problems

  1. Should counts be compared directly across differently sized groups? 1 for yes, 0 for no.

    Answer

  2. 9 out of 12. What percent?

    Answer

Stretch Yourself

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

2 problems

  1. The Row Total

    A row has 12 and 18. What is the row total?

    Answer

  2. The Proportion

    15 out of 60. What percent is that?

    Answer