A television sports commentator wants to estimate the proportion of citizens who​ "follow professional​ football." Complete parts​ (a) through​ (c).   (a) What sample size should be obtained if he wants to be within 3 percentage points with 96​% confidence if he uses an estimate of 48​% obtained from a​ poll?   (b) What sample size should be obtained if he wants to be within 3 percentage points with 96% confidence if he does not use any prior estimates?   (c) Why are the results from parts (a) and (b) so close?

Q: 4a. He seems flustered and asks, "That's higher than I thought! Since you didn't ask everyone in the…

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Q: A sample of 50 potential customers was asked to use your new product and the product of the leading…

A: Let n = sample size = 50 X = number of customers who preferred the product in the sample = 30

Q: College officials want to estimate the percentage of students who carry a gun, knife, or other such…

A: a) The confidence level is 93%. Therefore, α = 0.07, α/2=0.035 and 1-α/2=0.965. The margin of error…

Q: In 1941, an organization surveyed 1100 adults and asked, "Are you a total abstainer from, or do you…

A: We have given that For the survey taken in 1941 n1 = 1100x1 = 374p̂ = x1/n1 = 151/429 = 0.3520 And…

Q: In 1940, an organization surveyed 1100 adults and asked, "Are you a total abstainer from, or do you…

A: Let p1 represents the population proportion of 1940 adults who were total abstainers and p2…

Q: Nationally, 83% of Americans have earned a high school diploma.  We want to see if the proportion of…

A: We have to find sample proportion.

Q: Bopulation proportion of 1943 adults who were total abstainers and p, represent the population…

A: Solution: Given N1=1100,  X1=429 N2=1100,  X2=374 (α)= 0.05

Q: You are running a political campaign and wish to estimate, with 95% confidence, the proportion of…

A: Formula for the sample size needed to estimate a population proportion is

Q: College officials want to estimate the percentage of students who carry a gun, knife, or other such…

A: I have provided the solution below please do refer it and let me know if you have any queries…

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: Assume, p^ be the estimated proportion of computers with new operating system. n be the minimum…

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: Here the parameter, p determines the true proportion (or percentage) of the computers that use a new…

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A:

Q: I want to estimate the proportion of college professors who believe in aliens. How many college…

A: It is given that margin of error (E) is 0.05 and the confidence level is 0.95.

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A:

Q: A political pollster wants to estimate the proportion of voters who will vote for theDemocratic…

A: The given values in this problem are:Confidence level (C) = 90%Margin of error (E) = 0.04Since the…

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: From the given information, the margin of error (E) is 0.12 and the confidence level is 0.98.

Q: If the difference of mode and median of a data is 24, then the difference of median and mean is (a)…

A: From the provided information,The difference of mode and median of a data is 24.Mode - Median = 24…

Q: Health insurance benefits vary by the size of the company (the Henry J. Kaiser Family Foundation…

A: a:For the given data, the chi-square test for association is appropriate.Null Hypothesis:H0: The…

Q: A survey asked, "Which leg do you put into your trousers first?" Of the 2,710 Americans surveyed,…

A:

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: The confidence level is 90%, the sample percentage is within 4.5 percentage points of the true…

Q: You are the operations manager for an airine and you are considering a higher fare level for…

A: It is given that margin of error (E) is 0.015 and the confidence level is 0.90.

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A:

Q: In 1942 ​, an organization surveyed 1100   adults and​ asked, "Are you a total abstainer​ from, or…

A: The proportion of considered subjects, on which we are interested from a sample can be termed as…

Q: College officials want to estimate the percentage of students who carry a gun, knife, or other such…

A: a)  The sample size is = 3383 b)The sample size is = 520

Q: A television sports commentator wants to estimate the proportion of citizens who​ "follow…

A: Solution: From the given information, confidence level is 0.96 and E=0.02.

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A:

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: When we don't have any prior information about population proportion, we generally take it as 0.50.…

Q: b. Which group is more likely to have taken a vacation in the last year: college graduates or…

A: Given data:   Yes No Total College Graduate 183 67 250 Not a College Graduate 126 124 250…

Q: In 1945, an organization surveyed 1100 adults and asked, "Are you a total abstainer from, or do you…

A: Let, X1= number of abstainer in the previous test n1= total sample size of the past test p1^ =…

Q: Interpret calculator display: In a recent poll, people were asked whether they supported an increase…

A: Given

Q: A television sports commentator wants to estimate the proportion of citizens who​ "follow…

A: compute sample size ( n ) = n=(Z/E)^2*p*(1-p)

Q: A researcher wants to determine what proportion of all high school students plans to attend…

A: Obtain the critical value at 90% confidence level:It is given that the margin of error is 0.02. The…

Q: Mr. Scoville ran for school board last year and got 18% of the vote.  He is running again this year.…

A: From the provided information,Mr. Scoville ran for school board last year and got 18% of the vote…

Q: (a) One of Statistics assignment, students are required to do a survey to practice for data…

A: Data are the basic material needed for effective statistical inference and decision-making on a…

Q: In 1944​, an organization surveyed 1100 adults and​ asked, "Are you a total abstainer​ from, or do…

A: We habe to find given proportion.

Q: In each part, give the value of the standardized statistic (z-score) for the sample proportion.…

A: The objective of the question is to calculate the z-score for the sample proportion in each of the…

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: Given Margin of error=0.05 At 95% CI=1.96

Q: A television sports commentator wants to estimate the proportion of citizens who​ "follow…

A: Given Data: Margin of Error=0.22 p=0.54   z-value=1.96

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.