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

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Question 18

A study of 20 students compares the time spent studying ( $t\,$ hours) and their final test scores ( $s\,$ marks).

The product moment correlation coefficient for the sample is $r = 0.435$ .

Stating your hypotheses clearly test, at the 2.5% significance level, whether there is a positive correlation between study time and test scores.

[4]

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)

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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 18

A study of 20 students compares the time spent studying ( $t\,$ hours) and their final test scores ( $s\,$ marks).

The product moment correlation coefficient for the sample is $r = 0.435$ .

Stating your hypotheses clearly test, at the 2.5% significance level, whether there is a positive correlation between study time and test scores.

[4]

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.