Chapter 11 Problems 1 and 2 a. Target population: households Sampling Frame: the list of the residential addresses in the Chicago area b. Target: customers that have a store charge card Sampling Frame: The store database containing the data of all customers that have the store charge card c. Target: the households that have a TV at home Sampling Frame: The computer program that will randomly generate the local phone numbers excluding nonworking and business numbers. d. Target: …showed first 75 words of 495 total…

…showed last 75 words of 495 total…we could get the sample that would only represents the manufacturers whose demand for press is little. We have to remember that the subgroup of the heaviest users of the power press can be very small and random sampling could not include its representation. By using the stratified research, we ensure that all subgroups will be represented. Chapter 12 Problems 1-3 1. a. 0.9306 b. 0.028717 c.0.040720 d.0.901847 2. a. - 0.2529 b.1.2817 c. -1.0 to 1.0 3. 95 % confidence D = ± 5