Mathematics, 07.11.2019 03:31, selenamr
Aregional 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 16:50, angelkiss2019
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Mathematics, 21.06.2019 18:00, bravomichelle75
Aschool puts on a play. the play costs $1,200 in expenses. the students charge $4.00 for tickets. there will be one performance of the play in an auditorium that seats 500 people. what is the domain of the function that shows the profit as a function of the number of tickets sold?
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Mathematics, 21.06.2019 20:20, Kelbee781
Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?
Answers: 1
Aregional transportation authority is interested in estimating the mean number of minutes working ad...
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