Exercise
Form 7: Predictions and Proportions from Samples
Use proportions from sample data to make predictions about populations. Practice interpreting sample results to calculate estimated outcomes.
Questions
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MultiChoice
In a random sample of 50 middle schoolers, 35 prefer chocolate ice cream. Predict how many in a school of 1,000 prefer chocolate.
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MultiChoice
A random survey shows 4 out of 10 families recycle paper. Predict the number of recycling families in a neighborhood of 300.
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MultiChoice
In a sample of 20 students, 9 play video games daily. Predict how many students out of 1,000 play daily.
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MultiChoice
A random sample of 25 bikes showed 15 are mountain bikes. Out of 500 total bikes, predict how many are mountain bikes.
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MultiChoice
Survey data: 7 out of 20 people prefer tea over coffee. Predict how many out of 800 people prefer tea.
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MultiChoice
A quality control check finds 3 defective bulbs in a random sample of 100. Predict defects in a batch of 2,000 bulbs.
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MultiChoice
In a random sample of 30 students, 12 attend after-school tutoring. Predict tutoring attendance for 400 students.
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MultiChoice
Out of 40 surveyed households, 15 have a cat. Predict the number of cat-owning households in a community of 1,000.
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MultiChoice
It rained on 6 out of 30 randomly sampled days in a city. Predict how many rainy days occur in 120 days.
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MultiChoice
In a random sample of 50 voters, 27 support Measure A. Predict total votes for Measure A out of 1,000 voters.
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MultiChoice
In a sample of 80 raffle tickets, 12 were winning tickets. Predict total winners in a batch of 1,000 tickets.
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MultiChoice
A sample of 25 students finds 16 play a sport. Predict how many out of 500 total students play a sport.