A managerial decision problem. A direct-mail company assembles and stores paper products (envelopes, letters, brochures, order cards, etc.) for its customers. The company estimates the total number of pieces received in a shipment by estimating the weight per piece and then weighing the entire shipment. The company is unsure whether the sample of pieces used to estimate the
- a. Identify the response, factor(s). treatments, and experimental units.
- b. Do these data provide sufficient evidence to indicate differences in the mean weight per brochure among the five cartons?
- c. What assumptions must be satisfied in order for the test of part b to be valid?
- d. Use Tukey’s method to compare all pairs of means, with α = .05 as the overall level of significance.
- e. Given the results, make a recommendation to management about whether to sample from one carton or from many cartons.
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Statistics for Business and Economics (13th Edition)
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