A random sample of 50 observations was made on the diameter of spot welds and the
Chapter 11, Problem 11-69(choose chapter or problem)
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 0, using 0.01. What is the P-value for this test? (b) Find a 99% confidence interval for . (c) Based on the confidence interval in part (b), can you conclude that 0.5 at the 0.01 level of significance? 11-
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