Mathematics, 06.12.2021 18:10 Fitch44
In a survey conducted by the Gallup organization September 6-9, 2012, 1,017 adults were asked "In
general, how much trust and confidence do you have in the mass media - such as newspapers, TV,
and radio - when it comes to reporting the news fully, accurately, and fairly?" Of the 1,017
respondents, 214 said they had "no confidence at all."
a). Test, at the 5% level, if this sample provides evidence that the proportion of U. S. adults who have no confidence in the media differs significantly from 25%. Verify that the sample size is large enough to use the normal distribution to compute the p-value for this test and include all of the details of the test.(Please show work for all)
b). Verify that the sample size is large enough to use the normal distribution to construct a confidence interval for the proportion of U. S. adults who have no confidence in the media.
c). Construct a 90% confidence interval for the proportion of U. S. adults who have no confidence in the media. Round the margin of error to three decimal places.
Bonus:
d). What sample size is needed to reduce the margin of error to 1%?
Answers: 2
Mathematics, 21.06.2019 22:00, bobk1433
Mrs. avila is buying a wallpaper border to go on all of her kitchen walls. she wants to buy 5 extra feet of wallpaper border than she needs to be sure she has enough. she buys 55.5 feet of the border. the store owner selling the border uses the width of mrs. avila's kitchen to determine that the length of her kitchen must be 14.5 feet.
Answers: 2
Mathematics, 21.06.2019 23:00, freebyyy7032
Unaware that 35% of the 10000 voters in his constituency support him, a politician decides to estimate his political strength. a sample of 200 voters shows that 40% support him. a. what is the population? b. what is the parameter of interest? state its value c. what is the statistics of the interest? state its value d. compare your answers in (b) and (c) is it surprising they are different? if the politician were to sample another 200 voters, which of the two numbers would most likely change? explain
Answers: 2
In a survey conducted by the Gallup organization September 6-9, 2012, 1,017 adults were asked "In...
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