For Exercises 6.51 and 6.52, see pages 320–321; for 6.53 to 6.55, see pages 323–324; for 6.56 to 6.59, see pages 325–326; for 6.60 to 6.62, see pages 328–329; for 6.63 and 6.64, see page 331; and for 6.65 and 6.66, see page 332.
6.51 Customer feedback.
Feedback from your customers shows that many think it takes too long to fill out the online order form for your products. You redesign the form and plan a survey of customers to determine whether or not they think that the new form is actually an improvement. Sampled customers will respond using a 5-point scale: if the new form takes much less time than the old form; if the new form takes a little less time; 0 if the new form takes about the same time; if the new form takes a little more time; and if the new form takes much more time. The mean response from the sample is , and the mean response for all of your customers is State null and alternative hypotheses that provide a framework for examining whether or not the new form is an improvement.
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