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

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Question 36

Liam is investigating whether there is a correlation between the daily maximum temperature and the daily sales of hot chocolate at his café.

He collects data for a random sample of 25 days and calculates a product moment correlation coefficient of r=−0.42r = -0.42r=−0.42.

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

State clearly

  • your hypotheses
  • your critical value
[3]

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

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