Pearson Edexcel GCSE (9-1) · Statistics (1ST0)

Population and sampling: Practice Questions

5 multiple-choice questions marked as you go, and 3 written questions with worked solutions. All on Population and sampling.

8 questions14 marksFree, no account

Question 1

1 mark

In a scatter diagram, which variable is traditionally plotted on the \(x\)-axis?

Question 2

1 mark

A company wants to sample its employees to ensure the sample has the same proportion of males and females as the whole workforce. The company has 400 employees, of which 240 are female. If they want a sample size of 50, how many females should be in the stratified sample?

Question 3

1 mark

A researcher uses a 'random response' technique when asking students if they have ever cheated in an exam. What is the primary purpose of using this technique in data collection?

Question 4

1 mark

A group of students are asked to name their favourite colour. What type of data is being collected?

Question 5

1 mark

Which of the following describes 'cleaning' data?

Question 6

2 marks

A researcher wants to study the heights of students in a large school.
State the sampling frame if the researcher uses the school's official student register to select participants. <\/p>

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Question 7

3 marks

A small company has 40 employees: 10 in Management and 30 in Sales.
A stratified sample of size 8 is to be taken. Calculate the number of employees that should be sampled from the Sales stratum<\/b>.<\/p>

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Question 8

4 marks

A researcher is investigating the relationship between the number of hours students spend on social media and their test scores. The researcher collects the following data from a small group of 5 students:

Student A: 2 hours, 85%
Student B: 5 hours, 72%
Student C: 1 hour, 90%
Student D: 4 hours, 78%
Student E: 3 hours, 82%

(a) Identify which variable is the explanatory (independent) variable and which is the response (dependent) variable.
(b) The researcher decides to collect more data using a simple random sample of students from a local school. Suggest a suitable sampling frame for this investigation.
(c) State one possible constraint the researcher might face when collecting this data.

Write your answer out first, then check it against the worked solution.

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