Jamal, a farmer, claims that the larger the rainfall, the greater the yield of wheat from his farm - AQA - A-Level Maths Mechanics - Question 15 - 2019 - Paper 3
Question 15
Jamal, a farmer, claims that the larger the rainfall, the greater the yield of wheat from his farm.
He decides to investigate his claim, at the 5% level of signific... show full transcript
Worked Solution & Example Answer:Jamal, a farmer, claims that the larger the rainfall, the greater the yield of wheat from his farm - AQA - A-Level Maths Mechanics - Question 15 - 2019 - Paper 3
Step 1
Identify the critical value
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Answer
The critical value for the 5% significance level is 0.549.
Step 2
Compare the correlation coefficient to the critical value
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Answer
The calculated correlation coefficient is 0.567. Since 0.567 > 0.549, we reject the null hypothesis.
Step 3
Make a conclusion
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Answer
There is sufficient evidence to conclude that the larger the rainfall, the greater the yield, indicating a positive correlation between rainfall and wheat yield.
