Statistics Paper 1 Data and Probability 2019

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Centre Number Candidate Number
Pearson Edexcel
Level 3 GCE
Tuesday 18 June 2019
Morning (Time: 2 hours) Paper Reference 9ST0/01

Statistics
Advanced
Paper 1: Data and Probability

You must have: Total Marks
Statistical Formulae and Tables booklet
Calculator

Candidates may use any calculator allowed by Pearson regulations.
Calculators must not have retrievable mathematical formulae stored in
them.
Instructions
•• Use black ink or ball-point pen.
If pencil is used for diagrams/sketches/graphs it must be dark (HB or B).
Coloured pencils and highlighter pens must not be used.
• centre
Fill in the boxes at the top of this page with your name,
number and candidate number.
• clearly labelled.
Answer all questions and ensure that your answers to parts of questions are

• Answer the questions in the spaces provided
– there may be more space than you need.
• You should show sufficient working to make your methods clear.
Answers without working may not gain full credit.
• Unless otherwise stated, statistical tests should be carried out at the
5% significance level.
• When a calculator is used, the answer should be given to three significant
figures unless otherwise stated.
Information
•• AThere
booklet ‘Statistical Formulae and Tables’ is provided.
are 8 questions in this question paper. The total mark for this paper is 80.
• – use this asfora guide
The marks each question are shown in brackets
as to how much time to spend on each question.
Advice
•• Read each question carefully before you start to answer it.
Try to answer every question.
•• Check your answers if you have time at the end.
If you change your mind about an answer, cross it out and put your
new answer and any working underneath. Turn over


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, Answer ALL questions. Write your answers in the spaces provided.

1 Eva has been asked by the manager of a gym to select a sample of members. Each one




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of these people will be sent a questionnaire to complete by post.
She has been told that half of the sample should be aged 60 years or over.
(a) Explain how Eva could select a stratified sample of 50 gym members to post the
questionnaires to.
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Eva has been told that she needs 50 completed questionnaires for her results analysis.
(b) Explain why your sampling method described in (a) is unlikely to be sufficient for
Eva’s analysis.
(1)
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, (c) Describe how you would change your sampling method described in (a) to allow for this.
(2)
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(Total for Question 1 is 7 marks)
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