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2.5.7 Hypothesis test using Pearson's coefficient (A-level only)

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Question 3

Sarah believes there is a positive correlation between the amount of time spent practicing the piano and the score achieved in a music exam.

She calculates the product moment correlation coefficient between these two variables for a random sample of 20 students and obtains r=0.391r = 0.391r=0.391.

Carry out a suitable test to investigate Sarah's belief at a 5% level of significance.

State clearly

  • your hypotheses
  • your critical value
[3]
Markscheme

2.5.7 Hypothesis test using Pearson's coefficient (A-level only) Questions

  1. A Level
  2. /Maths
  3. /2.5.7 Hypothesis test using Pearson's coefficient (A-level only)

47 exam-style questions on OCR A Level Maths 2.5.7 Hypothesis test using Pearson's coefficient (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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