Use a random sample to make predictions
7th grade (Year 8 in England) · 16 questions · Common Core: 7.SP.A.2 · England: KS3 Statistics
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Date
Score/ 16
Question 1
In a random sample of 20 students, 12 walk or cycle to school. Predict how many of the school's 600 students walk or cycle to school.
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Question 2
Scientists tag 45 fish in a lake and release them. Later they catch 40 fish and 5 are tagged. Estimate the number of fish in the lake (nearest whole number).
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Question 3
In a random sample of 20 students, 9 want a longer lunch break. Predict how many of the school's 440 students want a longer lunch break.
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Question 4
Scientists tag 28 fish in a lake and release them. Later they catch 50 fish and 6 are tagged. Estimate the number of fish in the lake (nearest whole number).
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Question 5
In a random sample of 50 students, 21 prefer online games to board games. Predict how many of the school's 1250 students prefer online games to board games.
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Question 6
Scientists tag 45 fish in a lake and release them. Later they catch 40 fish and 10 are tagged. Estimate the number of fish in the lake (nearest whole number).
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Question 7
In a random sample of 20 students, 7 prefer online games to board games. Predict how many of the school's 580 students prefer online games to board games.
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Question 8
Scientists tag 52 fish in a lake and release them. Later they catch 40 fish and 8 are tagged. Estimate the number of fish in the lake (nearest whole number).
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Question 9
In a random sample of 50 students, 12 prefer online games to board games. Predict how many of the school's 500 students prefer online games to board games.
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Question 10
Scientists tag 24 fish in a lake and release them. Later they catch 50 fish and 12 are tagged. Estimate the number of fish in the lake (nearest whole number).
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Question 11
In a random sample of 20 students, 18 prefer online games to board games. Predict how many of the school's 320 students prefer online games to board games.
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Question 12
Scientists tag 39 fish in a lake and release them. Later they catch 40 fish and 9 are tagged. Estimate the number of fish in the lake (nearest whole number).
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Question 13
In a random sample of 20 students, 9 prefer online games to board games. Predict how many of the school's 260 students prefer online games to board games.
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Question 14
Scientists tag 49 fish in a lake and release them. Later they catch 50 fish and 7 are tagged. Estimate the number of fish in the lake (nearest whole number).
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Question 15
In a random sample of 40 students, 25 want a longer lunch break. Predict how many of the school's 560 students want a longer lunch break.
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Question 16
Scientists tag 43 fish in a lake and release them. Later they catch 50 fish and 5 are tagged. Estimate the number of fish in the lake (nearest whole number).
Answer
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