Mathematics, 15.10.2020 08:01 yaneli0717
A regional transportation authority is interested in estimating the mean number of minutes working adults in the region spend commuting to work on a typical day. A random sample of working adults will be selected from each of three strata: urban, suburban, and rural. Selected individuals will be asked the number of minutes they spend commuting to work on a typical day. Why is stratification used in this situation? A. To remove bias when estimating the proportion of working adults living in urban, suburban, and rural areas. B. To remove bias when estimating mean commuting time. C. To reduce bias when estimating mean commuting time. D. To decrease the variability in estimates of the proportion of working adults living in urban, suburban, and rural areas. E. To decrease the variability in estimates of the mean commuting time.
Answers: 1
Mathematics, 21.06.2019 13:00
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Mathematics, 21.06.2019 15:10
If the graphs of the linear equations in a system are parallel, what does that mean about the possible solution(s) of the system? a. there are infinitely many solutions. b. there is no solution. c. there is exactly one solution. d. the lines in a system cannot be parallel.
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Mathematics, 21.06.2019 23:00
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A regional transportation authority is interested in estimating the mean number of minutes working a...
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