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 _ = .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)?
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