Mathematics, 22.04.2020 01:52 marissakirk8785
A report on the politics of climate summarized data from a survey on public opinion of renewable and other energy sources. It was reported that 55% of the people in a sample from western states said that they have considered installing solar panels on their homes. This percentage was based on a representative sample of 364 homeowners in the western United States.
The report also indicated that 35% of those in a representative sample of 532 homeowners in southern states said that they had considered installing solar panels.
(a)
Use the given information to construct a 90% confidence interval for the proportion of all homeowners in the southern states who have considered installing solar panels. (Round your answers to three decimal places.)
We are 90% confident that the true proportion of all homeowners in the southern states who have considered installing solar panels falls directly in the middle of this interval. We are 90% confident that the true proportion of all homeowners in the southern states who have considered installing solar panels falls within this interval. There is a 90% chance that the true proportion of all homeowners in the southern states who have considered installing solar panels falls directly in the middle of this interval. We are 90% confident that the mean number of all homeowners in the southern states who have considered installing solar panels falls within this interval. There is a 90% chance that the true proportion of all homeowners in the southern states who have considered installing solar panels falls within this interval.
(b)
Give two reasons why the confidence interval in part (a) is narrower than a 90% confidence interval for the proportion of all homeowners in western states who have considered installing solar panels. (Select all that apply.)
The confidence interval in part (a) is narrower because the confidence level for southern states is higher than the confidence level for western states. The confidence interval in part (a) is narrower because the sample size for southern states is larger than the sample size for western states. The confidence interval in part (a) is narrower because the sample proportion for southern states is closer to 0.5 than the sample proportion for western states. The confidence interval in part (a) is narrower because the sample proportion for southern states is farther from 0.5 than the sample proportion for western states. The confidence interval in part (a) is narrower because the confidence level for southern states is lower than the confidence level for western states. The confidence interval in part (a) is narrower because the sample size for southern states is smaller than the sample size for western states.
Answers: 1
Mathematics, 21.06.2019 17:30, hiiliohi9433
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Mathematics, 21.06.2019 20:00, proutyhaylee
Suppose a store sells an average of 80 cases of soda per day. assume that each case contains 24 cans of soda and that the store is open 10 hours per day. find the average number of soda that the store sells per hour.
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Mathematics, 21.06.2019 22:00, highschoolkid621
10 points? ? +++ me asap gabriella uses the current exchange rate to write the function, h(x), where x is the number of u. s. dollars and h(x) is the number of euros, the european union currency. she checks the rate and finds that h(100) = 7.5. which statement best describes what h(100) = 75 signifies? a) gabriella averages 7.5 u. s. dollars for every 100 euros. b) gabriella averages 100 u. s. dollars for every 25 euros. c) gabriella can exchange 75 u. s. dollars for 100 euros. d) gabriella can exchange 100 u. s. dollars for 75 euros.
Answers: 2
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