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Aquarium Feeding: Follow the Trial Evidence worksheet preview

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Aquarium Feeding: Follow the Trial Evidence

Estimate probabilities from aquarium feeding trials, examine long-run frequencies, and predict results under different tank conditions.

Grade 7MathInteractive · Printable

Aligned to7.SP.C.6

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What’s included

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

Details

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

About this worksheet

What students practice

  • Students estimate probabilities using relative frequencies from repeated chance trials.
  • Students interpret changes in relative frequency as the number of trials increases.
  • Students predict counts using probability estimates and account for changed trial conditions.

How to use

Have students work through the recorded trials before using the larger data sets. Discuss why predictions depend on keeping tank conditions unchanged.

Curriculum

Common Core standard covered

7.SP.C.6

Estimate a probability by running a chance process many times and watching its relative frequency, then predict results.

Preview

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Name Date

Aquarium Feeding: Follow the Trial Evidence

Use repeated trials to estimate probabilities and plan feeding checks.

Record the Feeding Trials

An aquarium tests where floating food pellets drift. Each trial releases one pellet from the same spot in a fish-free test tank. After 10 seconds, staff record whether it is inside a feeding ring. They remove the pellet and reset before the next trial.

1.
Staff want to estimate the probability that a pellet is inside the ring after 10 seconds. Which record gives the relative frequency they need?
  • A. Divide the number inside by the number outside.
  • B. Divide the total number of trials by the number inside.
  • C. Divide the number inside by the total number of trials.
  • D. Divide the number outside by the total number of trials.
2.
Read the first 20 trial results in order. I means inside the ring; O means outside the ring.
I O O I O O O I O I
O O I O O I O O I O

How many trials ended with the pellet inside the ring?   trials

3.
Use the 20 trial results in Question 2 to estimate the probability that a pellet ends inside the ring.

Write your estimate as a decimal.  

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