Grade 6 Mathematics · Unit 2: Understanding the World Around Us Through StatisticsStandard 6.DS.5

Lesson 2.22.2 Small Group · Group 2

Group 2 · Set BSecond challenge form · new problems, same idea

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Learning target I can make and read a histogram to display data in intervals, explain why the method works, and use it on a problem I have not seen before.

Remember2.2 Small Group · Group 2

A histogram counts how many values fall in each interval, so you can add bar heights, but you cannot read the exact values. Each value belongs to exactly one interval. A histogram shows counts, not the exact values.

Words: Histogram (Histograma)Frequency (Frecuencia)Interval (Intervalo)Distribution (Distribución)Variability (Variabilidad)

  1. 1Complete each step, then write the final answer.

    A histogram of test scores shows 60–69: 3 students, 70–79: 8 students, 80–89: 6 students and 90–99: 2 students. How many students scored 80 or more?

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    Final answer:
  2. 2Complete each step, then write the final answer.

    Data: 8, 10, 13, 19, 20, 26, 30, 30. Use intervals of 0–9, 10–19, 20–29 and 30–39. What is the frequency of 10–19?

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    Final answer:
  3. 3Complete each step, then write the final answer.
    03691215020406080Weight (pounds)Number of dogs

    A histogram shows the weights of 40 dogs in pounds. 0–19 has 14 dogs, 20–39 has 15, 40–59 has 8 and 60–79 has 3. How many dogs weigh 40 pounds or more?

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    Final answer:
  4. 4Complete each step, then write the final answer.

    Data: 2, 4, 6, 11, 12, 13, 14, 17. With intervals of 10, the 10–19 bar is 5 tall. Now use intervals of 5. How tall is the 10–14 bar?

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    Final answer:

Explain your thinkingThe same data can make a histogram with intervals of 5 or of 10. Which one tells you more? Defend your choice.

How did it go? ☐ 4 · I can teach it☐ 3 · I've got it☐ 2 · I need a hint☐ 1 · I need help