Question: A random sample of 50 observations was made on the diameter of spot welds and the corresponding weld shear strength. (a) Given that r =

A random sample of 50 observations was made on the diameter of spot welds and the corresponding weld shear strength.
(a) Given that r = 0.62, test the hypothesis that p = 0, using a = 0.01. What is the P-value for this test?
(b) Find a 99% confidence interval for p.
(c) Based on the confidence interval in part (b), can you conclude that p = 0.5 at the 0.01 level of significance?

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