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2.5.11 Inference using a correlation coefficient (A-level only)

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Question 14

Clara is investigating whether there is a correlation between the age of a second-hand car and its market value.

Suggest a suitable null and alternative hypothesis for a two-tail test.

[2]

Clara takes a sample of 18 cars and finds a product moment correlation coefficient of -0.45.

Carry out the hypothesis test at the 5% significance level.

[2]

Markscheme

2.5.11 Inference using a correlation coefficient (A-level only) Questions

A Level
Maths
2.5.11 Inference using a correlation coefficient (A-level only)

47 exam-style questions on OCR (MEI) A Level Maths 2.5.11 Inference using a correlation coefficient (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

2.5.11 Inference using a correlation coefficient (A-level only)

Question bank

2.5.11 Inference using a correlation coefficient (A-level only)

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47

Question 14

Clara is investigating whether there is a correlation between the age of a second-hand car and its market value.

Suggest a suitable null and alternative hypothesis for a two-tail test.

[2]

Clara takes a sample of 18 cars and finds a product moment correlation coefficient of -0.45.

Carry out the hypothesis test at the 5% significance level.

[2]

Markscheme

2.5.11 Inference using a correlation coefficient (A-level only) Questions

A Level
Maths
2.5.11 Inference using a correlation coefficient (A-level only)

47 exam-style questions on OCR (MEI) A Level Maths 2.5.11 Inference using a correlation coefficient (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.