An article describes a survey of 2,096 adult Americans. Survey participants were asked if they were football fans and also if they agreed or disagreed that the rules that theNational Football League adopted in 2010 designed to limit head injuries have been effective. Data from the survey are summarized in the table below.Football FanNot a Football FanTotal(i) P(A) = 0.4399(ii) P(D) = 0.5601(iii) P(A|F) =(iv) P(A|FC) =Agree703219922Disagree Total513 1,216Suppose that a survey participant is to be selected at random. Consider the following events.A = event selected participant agreed that the rules have been effectiveD = event selected participant disagreed that the rules have been effectiveF = event selected participant was a football fan(a) Calculate the following probabilities. (Round your answers to four decimal places.)6618801,174 2,096(b) Are the events F and A independent events? Justify your answer using relevant probabilities.Yes, the events F and A are independent because P(A|F) ‡ P(A)Yes, the events F and A are independent because P(A|F) = P(A)No, the events F and A are not independent because P(A|F) = P(A)O No, the events F and A are not independent because P(A|F) ‡ P(A)

The question is about probability.Given :To find :a ) P ( A ) , P ( D ) , P ( A | F ) , P ( A | Fc…

Answered: An article describes a survey of 2,096…

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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The Student Union President conducted a survey to estimate the proportion of first year students who participated in the social activities organized by the Student Union. Which of the following surveying options does NOT affect the presidents ability to generalize the survey to all first year students. The president put the survey on the Student Union webpage a Monday and collected the responses at the end of the week. All of the other options present a problem for generalizing the results. The president polled all students coming out of the Student Union on a given Monday. The freshmen class consists of 3000 students. A random sample of only 300 were sent a survey. Only 150 responded. The survey was sent only to first year students enrolled in statistics courses because all students need to satisfy a statistics general education requirement.
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In 1942, an organization surveyed 1100 adults and asked, "Are you a total abstainer from, or do you on occasion consume, alcoholic beverages?" Of the 1100 adults surveyed, 440 indicated that they were total abstainers. In a recent survey, the same question was asked of 1100 adults and 418 indicated that they were total abstainers. Complete parts (a) and (b) below. (a) Determine the sample proportion for each sample. and respectively. The proportions of the adults who took the 1942 survey and the recent survey who were total abstainers are (Round to three decimal places as needed.)
A programmer plans to develop a new software system. In planning for the operating system that he will use, he needs to estimate the percentage of computers that use a new operating system. How many computers must be surveyed in order to be 99% confident that his estimate is in error by no more than three percentage points? Complete parts (a) through (c) below. Question content area bottom Part 1 a) Assume that nothing is known about the percentage of computers with new operating systems. n=enter your response here (Round up to the nearest integer.) Part 2 b) Assume that a recent survey suggests that about 90% of computers use a new operating system. n=enter your response here (Round up to the nearest integer.) Part 3
A programmer plans to develop a new software system. In planning for the operating system that he will use, he needs to estimate the percentage of computers that use a new operating system. How many computers must be surveyed in order to be 99% confident that his estimate is in error by no more than two percentage points question mark Complete parts (a) a) Assume that nothing is known about the percentage of computers with new operating systems.
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