2. A national health organization warns that 30% of the middle school students nationwidehave been drunk. Concerned, a local health agency randomly and anonymously surveys110 of the 1212 middle school students in its city. Only 21 of them report having beendrunk.a) What proportion of the sample reported having been drunk?b) Does this mean that this city's youth are not drinking as much as the national datawould indicate?c) Create a 95% confidence interval for the proportion of the city's middle schoolstudents who have been drunk.d) Is there any reason to believe that the national level of 30% is not true of the middleschool students in the city?e) To keep the margin of error at most 5%, how many middle school students do we needto survey?ofa confidence interval. Among them are the sample

Answered: A national health organization warns…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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When two births are randomly selected, the sample space for genders is bb, bg, gb, and gg. Assume that those four outcomes are equally likely. Construct a table that describes the sampling distribution of the sample proportion of girls from two births. Does the mean of the sample proportions equal the proportion of girls in two births? Does the result suggest that a sample proportion is an unbiased estimator of a 1 1 population proportion? For the entire population, assume the probability of having a boy is the probability of having a girl is, and this is not affected by how many boys or girls have previously been born. Determine the probabilities of each sample proportion. Sample proportion of girls ▼ ▼ ▼ Probability (Type integers or simplified fractions.)
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Answer the questions in the images.
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A graphing calculator is recommended.The following table lists the number of pages in four different types of magazines. Home decorating News Health Computer 175 89 85 104 287 95 157 139 165 123 91 98 209 107 106 209 199 101 97 147 Using a significance level of 5%, test the hypothesis that the four magazine types have the same average length. (Let 1 = Home decorating, 2 = News, 3 = Health and 4 = Computer.) 1.)Enter an exact number as an integer, fraction, or decimal.df(num) = 2.) Enter an exact number as an integer, fraction, or decimal.df(denom) = 3.)What is the test statistic? (Round your answer to two decimal places.) 4.)What is the p-value? (Round your answer to four decimal places.) 5.)(i) Alpha (Enter an exact number as an integer, fraction, or decimal.)? =

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