Mathematics, 04.10.2019 21:20, ayoismeisjjjjuan
Is college worth it? part i: among a simple random sample of 331 american adults who do not have a four-year college degree and are not currently enrolled in school, 48% said they decided not to go to college because they could not afford school.
part ii: exercise 6.16 presents the results of a poll where 48% of 331 americans who decide to not go to college do so because they cannot afford it.
#1: calculate a 90% confidence interval for the proportion of americans who decide to not go to college because they cannot afford it, and interpret the interval in context.
(a) lower bound: ( round to four decimal places)
(b) upper bound: ( round to four decimal places)
#2: interpret the confidence interval in context:
(a) we can be 90% confident that our confidence interval contains the sample proportion of americans who choose not to go to college because they cannot afford it
(b) 90% of americans choose not to go to college because they cannot afford it
(c) we can be 90% confident that the proportion of americans who choose not to go to college because they cannot afford it is contained within our confidence interval
#3: suppose we wanted the margin of error for the 90% confidence level to be about 1.5%. how large of a survey would you recommend?
(a) a survey should include at least people.
Answers: 2
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Is college worth it? part i: among a simple random sample of 331 american adults who do not have a...
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