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Track Meet: Model the Results Board worksheet preview

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Track Meet: Model the Results Board

Build nonuniform probability models from track results-board records, make predictions, and evaluate what an unobserved outcome means.

Grade 7MathInteractive · Printable

Aligned to7.SP.C.7.b

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What’s included

  • Single worksheet
  • Auto-graded online
  • 1 Common Core standard
  • Printable answer key
  • 13 questions
  • Classroom-ready

Details

Format
Interactive · Printable
Grade
Grade 7
Subject
Math
Question types
Fill in the blank, Multiple choice, Circle the answer, Sorting, Short answer

About this worksheet

What students practice

  • Students build probability models by dividing observed outcome frequencies by the total number of trials.
  • Students use observed probability models to predict results under comparable conditions.
  • Students explain why an outcome with an observed frequency of zero may still be possible.

How to use

Have students work through the board records independently, then compare models and discuss the final explanation. Allow fractions or decimals for probabilities.

Curriculum

Common Core standard covered

7.SP.C.7.b

Build a probability model, which may not be uniform, from frequencies observed in a chance process.

Preview

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Name Date

Track Meet: Model the Results Board

Use observed frequencies to model how track results reach the board.

From Timing System to Board

A delay is the time from an official result being released to its appearance on the results board. Use the observed frequencies to estimate probabilities for comparable updates.

Original Connection: 30 Updates
Delay (seconds)Number of updates
29
415
65
81
1.
Which probability list models delays of 2, 4, 6, and 8 seconds, in that order?
  • A. 1/4, 1/4, 1/4, 1/4
  • B. 2/20, 4/20, 6/20, 8/20
  • C. 9/30, 15/30, 5/30, 1/30
  • D. 9/30, 5/30, 15/30, 1/30
2.
The announcer checks the board 4 seconds after a result is released. An update arriving exactly then counts as available.

Estimate the probability that a comparable update is available by that check.  

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