To encourage telephone efficiency, a catalog call center issues a guideline that at least half of all telephone orders should be completed within 2 minutes. Subsequently, a random sample of 64...

To encourage telephone efficiency, a catalog call center issues a guideline that at least half of all telephone orders should be completed within 2 minutes. Subsequently, a random sample of 64 telephone calls showed that only 24 calls lasted 2 minutes or less. (a) At α = .05 is this a significant departure from the guideline in a left-tailed test? State your hypotheses and decision rule. (b) Find the p-value. (c) Is the difference important (as opposed to significant)?