Stat+131+-+HW+5+-+solutions

Stat+131+-+HW+5+-+solutions - 3.72. (a) This design would...

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3.66. (a) This is a stratified random sample. (b) Label from 01 through 27; beginning at line 122, we choose 13 (805), 15 (760), 05 (916), 09 (510), 08 (925), 27 (619), 07 (415), 10 (650), 25 (909), and 23 (310). Note: The area codes are in north-south order if we read across the rows; that is how they were labeled for this solution. Students might label down rather than across; the sample should include the same set of labels, but a different list of area codes.
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Unformatted text preview: 3.72. (a) This design would omit households without telephones or with unlisted numbers. Such households would likely be made up of poor individuals (who cannot afford a phone), those who choose not to have phones, and those who do not wish to have their phone numbers published. (b) Those with unlisted numbers would be included in the sampling frame when a random-digit dialer is used....
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Stat+131+-+HW+5+-+solutions - 3.72. (a) This design would...

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