2. (Textbook problem 9, page 21) Forsman and Lindell (1993) studied swallowing performance of adders (snakes). Captive snakes were fed with dead field voles (rodents) of differing body masses and the number of successful swallowing attempts was recorded. Out of 67 runs resulting in swallowing attempts, 58 were successful and 9 failed. (A failure was easy to detect because the fur of a partly swallowed and regurgitated vole is slick and sticks to the anterior part of the body.) (a) Test the hypothesis that p = 0.6 against the alternative p > 0.6 using the large-sample approximation, at the a = 0.05 level of significance. Give your decision rule, test statistic value, and conclusion. (b) Find an approximate p-value. (c) Find an approximate 95% (Wald) confidence interval for p, and interpret your interval in the context of the problem.

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