qIn a study of the correlation between the amount of rainfall and the quality of air pollution removed, 9
observations were made. The sample correlation coefficient is –0.9786. Test the null hypothesis
that there is no linear correlation between the variables. Use 0.05 level of
significance.
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qAnswer:
q 1. Ho: r = 0; H1: r¹ 0
q 2. a = 0.05
q 3. Use Fisher’s
Z
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q 4. Z < Z 0.025 (= -1.96) è
Reject the null hypothesis
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