Use a random sample to make predictions

Question 1

Scientists tag 42 fish in a lake and release them. Later they catch 40 fish and 7 are tagged. Estimate the number of fish in the lake (nearest whole number).

Answer 

Question 2

In a random sample of 50 students, 46 walk or cycle to school. Predict how many of the school's 750 students walk or cycle to school.

Answer 

Question 3

Scientists tag 21 fish in a lake and release them. Later they catch 60 fish and 12 are tagged. Estimate the number of fish in the lake (nearest whole number).

Answer 

Question 4

In a random sample of 40 students, 36 want a longer lunch break. Predict how many of the school's 880 students want a longer lunch break.

Answer 

Question 5

Scientists tag 45 fish in a lake and release them. Later they catch 60 fish and 5 are tagged. Estimate the number of fish in the lake (nearest whole number).

Answer 

Question 6

In a random sample of 20 students, 15 walk or cycle to school. Predict how many of the school's 280 students walk or cycle to school.

Answer 

Question 7

Scientists tag 25 fish in a lake and release them. Later they catch 80 fish and 12 are tagged. Estimate the number of fish in the lake (nearest whole number).

Answer 

Question 8

In a random sample of 25 students, 21 walk or cycle to school. Predict how many of the school's 275 students walk or cycle to school.

Answer 

Question 9

Scientists tag 32 fish in a lake and release them. Later they catch 50 fish and 4 are tagged. Estimate the number of fish in the lake (nearest whole number).

Answer 

Question 10

In a random sample of 25 students, 9 walk or cycle to school. Predict how many of the school's 750 students walk or cycle to school.

Answer 

Question 11

Scientists tag 55 fish in a lake and release them. Later they catch 60 fish and 5 are tagged. Estimate the number of fish in the lake (nearest whole number).

Answer 

Question 12

In a random sample of 25 students, 9 want a longer lunch break. Predict how many of the school's 350 students want a longer lunch break.

Answer 

Question 13

Scientists tag 29 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).

Answer 

Question 14

In a random sample of 25 students, 17 prefer online games to board games. Predict how many of the school's 450 students prefer online games to board games.

Answer 

Question 15

Scientists tag 54 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).

Answer 

Question 16

In a random sample of 50 students, 43 want a longer lunch break. Predict how many of the school's 550 students want a longer lunch break.

Answer