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Edexcel A-Level Mathematics A2 S2.4.3 Concept and Interpretation Questions

Practise setting hypotheses and interpreting test findings against a critical region with verified Edexcel IAL questions and mark schemes.

Syllabus
First assessment 2019
Course
Mathematics YMA01
Level
A2

Exam points

  • Match the alternative hypothesis to the claim direction, with equality kept only in H0.

Edexcel A-Level Mathematics A2 S2.4.3 Concept and Interpretation Questions question 1

[Maximum number: 3]

A photocopier in a school is known to break down at random at a mean rate of 8 times per week.

Question (a)

(a)

The headteacher of the school replaces the photocopier with a refurbished one and wants to find out if the rate of breakdowns has increased or decreased.

Write down suitable null and alternative hypotheses that the headteacher should use.

[ 1 ]

Question (b)

(b)

During the first week after it was installed there were 4 breakdowns.

Comment on this finding in the light of the critical region found in part (c).

[ 2 ]
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