Mathematics, 24.03.2020 17:33 roman2328
The file measles. dat contains data consistent with that obtained in a survey of parents whose children had not been immunized for measles during a recent campaign to immunize all children between the ages of 11 and 15. During the campaign, 7633 children from the 46 schools in the area were immunized; 9962 children whose records showed no previous immunization were not immunized. In a follow-up survey to explore why the children had not been immunized during the campaign, Roberts et al. (1995) sent questionnaires to the parents of a cluster sample of the 9962 children. Ten schools were randomly selected, then a sample of the Mi non immunized children from each school was selected and the parents of those children were sent a questionnaire. Not all parents responded to the questionnaire; you will examine the effects of nonresponse in Exercise 13 of Chapter 8. a Estimate, separately for each school, the percentage of parents who returned a consent form (variable returned ). For this exercise, treat the "no answer" responses (value 9) as not returned. b Using the number of respondents in school i as mi, construct the sampling weight for each observation. c Estimate the overall percentage of parents who received a consent form along with a 95% CI. d How do your estimate and interval in part (c) compare with the results you would have obtained if you had ignored the clustering and analyzed the data as an SRS
Answers: 1
Mathematics, 21.06.2019 14:30
Jack is considering a list of features and fees for denver bank. jack plans on using network atms about 4 times per month. what would be jackβs total estimated annual fees for a checking account with direct paycheck deposit, one overdraft per year, and no 2nd copies of statements?
Answers: 3
Mathematics, 22.06.2019 02:20
The function p(x) = β2(x β 9)2 + 100 is used to determine the profit on t-shirts sold for x dollars. what would the profit from sales be if the price of the t-shirts were $15 apiece?
Answers: 2
Mathematics, 22.06.2019 03:30
How much money does ron have left each month after his fixed expenses? ron graduated from college five years ago. he recently bought a house, but shares it with a housemate who pays him $800 a month for rent and utilities. ron is putting a budget worksheet together so he will have a better idea of where his money is going and where he can save. enlarge
Answers: 3
Mathematics, 22.06.2019 06:00
For problems 7β10, state a reasonable domain for the problem statement, find the inverse function f β1(x), and identify the independent and dependent quantities of the inverse. 7. gary is jogging. the total distance he has traveled, in miles, can be estimated using the function f(x) = 9x, where x is his jogging time in hours. 8. camryn sells computers. she earns commission for her computer sales plus a fixed wage for each day she works. her daily earnings, in dollars, can be estimated using the function f(x) = 0.15x + 50, where x represents her computer sales in dollars. 9. the distance a motorboat travels, in meters, can be estimated using the equation f(x) = 1.9x2, wherexisthetimeinseconds,for0β€xβ€10. 10. a rock band is selling tickets to a concert at a theater. the band earns money for each ticket sold, but has to pay some of the earnings to the theater. the total money earned by the band can be estimated using the function f(x) = 7.5x β 300, where x is the number of tickets sold.
Answers: 1
The file measles. dat contains data consistent with that obtained in a survey of parents whose child...
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