In a random sample of 1000 voters nationwide, 357 are found to support a particular candidate for the  presidential elections. A. Find a 98% confidence interval for the fraction of the voting population in favor of the candidate. B. How large a sample is needed if we wish to be at least 95% confident that the sample proportion is within  0.02 of the true fraction of the voting population?

Q: Out of 300 people sampled, 78 preferred Candidate A. Based on this, estimate what proportion of the…

A: From the given information,Out of 300 people sampled, 78 preferred candidate A.            So, here…

Q: 200 students were asked to randomly pick one of the numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. The…

A: Given that  Total number of students =200 Let X denote the number of student pick 7  From n=54…

Q: A random sample of likely voters showed that 62% planned to vote for Candidate X, with a margin of…

A: a. The percentage of voters who plan to vote for candidate X in the random sample of likely voters…

Q: Bob draws a simple random sample from an extremely large population of lemons.  The sample size is…

A: 1. Let p denotes the population proportion of good lemons. The sample size is 570 in which 310…

Q: 4. You conduct a survey of 16 random students at the Trafalgar campus of Sheridan College. Among…

A: We have to answer questions based on confidence interval for the proportions.

Q: A newsgroup is interested in constructing a 90% confidence interval for the proportion of all…

A: The given information is that, 528 randomly selected Americans, among 428 were in favor of the…

Q: A psychologist is interested in constructing a 99% confidence interval for the proportion of people…

A:

Q: 1. The confidence level measures A. The probability of the parameter being contained in the interval…

A: 1. The confidence level measures A. The probability of the parameter being contained in the…

Q: Out of 400 people sampled, 336 preferred Candidate A. Based on this, estimate what proportion of the…

A:

Q: Out of 400 people sampled, 200 preferred Candidate A. Based on this, estimate what proportion of the…

A: It is given that the, Out of 400 people sampled, 200 preferred Candidate A. Based on this, estimate…

Q: A researcher wishes to be 95% confidence that her estimate of the true proportion of individuals who…

A: we are given that , confidence interval = 95% true proportion   E=4% =0.04 we are given   sample of…

Q: A local newspaper named Balita Na conducts an election survey and reports that the independent…

A: Confidence interval is an estimate of an unknown population parameter.

Q: Bob draws a simple random sample from an extremely large population of lemons.  The sample size is…

A: Given that n=475. In 475 sample, there are 87 lemons turn out to be good and 388 lemons turn out to…

Q: A newsgroup is interested in constructing a 95% confidence interval for the proportion of all…

A:

Q: Out of 500 people sampled, 30 preferred Candidate A. Based on this, estimate what proportion of the…

A: The 500 people are sampled out of which 30 preferred candidate A. That is, n=500,x=30. The…

Q: Out of 400 people sampled, 300 preferred Candidate A. Based on this, estimate what proportion of the…

A: Given that Out of 400 people sampled, 300 preferred Candidate A.  Here x=300 n=400

Q: Out of 600 people sampled, 546 preferred Candidate A. Based on this, estimate what proportion of the…

A: X = 546 N = 600 95% confidence level

Q: Out of 500 people sampled, 465 preferred Candidate A. Based on this, estimate what proportion of the…

A: Givensample size(n)=500x=465 Confidence level(C.L)=95%

Q: In a​ poll, 69​% of the people polled answered yes to the question​ "Are you in favor of the death…

A: From the given question,69% of the people polled answered yes to the question.That means,…

Q: When 307 college students are randomly selected and surveyed, it is found that 128 own a car. Find a…

A: Given Data Sample Size, n = 307 Number of successes, x = 128 Significance level,…

Q: a. Does a 95% confidence interval using the smaller sample size allow you to predict the winner?…

A: Here given , A national television network took an exit poll of 1370 voters after each had cast a…

Q: 3. A political survey is conducted on a random sample of 1000 voters. Each voter was asked if they…

A: The question is about confidence interval Given : Randomly selected no. of voters ( n ) = 1000 No.…

Q: psychologist is interested in constructing a 99% confidence interval for the proportion of people…

A: Confidence interval: It is defined as the range which contains the value of true population…

Q: Out of 500 people sampled, 455 preferred Candidate A. Based on this, estimate what proportion of the…

A:

Q: Out of 600 people sampled, 552 preferred Candidate A. Based on this, estimate what proportion of the…

A: Sample size is n= 600 and 552 preferred candidate A.  So X= 552 p^ = X/n  = 552/600 = 0.92

Q: Bob draws a simple random sample from an extremely large population of lemons.  The sample size is…

A: Obtain the 95% confidence interval for the population proportion P of good lemons. The 95%…

Q: In a previous study, it was found that p̂= .73 for a particular sample. Suppose we would like to…

A: Given information Error = 0.01 Confidence level = 0.98

Q: A psychologist is interested in constructing a 95% confidence interval for the proportion of people…

A: Given P=(53/840) =0.06310 95℅ confidence internal Z-score =1.96

Q: 1.A random sample of 362 married couples found that 286 had two or more personality preferences in…

A: Given: The sample number of married couples are n=362. The number of couples who had two or more…

Q: Out of 100 people sampled, 83 preferred Candidate A. Based on this, estimate what proportion of the…

A: Find z-critical value:…

Q: Part a and b please

A: Step 1:(a) Find the percentage of voters who chose Candidate A. To find the percentage of voters who…

Q: ut of 600 people sampled, 300 preferred Candidate A. Based on this, estimate what proportion of the…

A: Given data, Out of 600 people sampled, 300 preferred Candidate A Construct 90% confidence level?

Q: A local newspaper named Balita Na conducts an election survey and reports that the independent…

A:

Q: Out of 200 people sampled, 176 preferred Candidate A. Based on this, estimate what proportion of the…

A: Numer of people sampled (n) = 200 Number of people who preferred candidate A (x) = 176 Find…

Q: Out of 500 people sampled, 220 preferred Candidate A. Based on this, estimate what proportion of the…

A: The sample size The probability of success Confidence level To compute the confidence interval for…

Q: Out of 300 people sampled, 261 preferred Candidate A. Based on this, estimate what proportion of the…

A:

Q: Question 7 Out of 200 people sampled, 76 preferred Candidate A. Based on this, estimate what…

A: Given x=76 n=200

Q: A newsgroup is interested in constructing a 99% confidence interval for the proportion of all…

A: Solution: a. Let X be the number of Americans favor the new green initiative and n be the sample…

Q: Out of 100 people sampled, 13 preferred Candidate A. Based on this, estimate what proportion of the…

A: It is given that sample size (n) is 100 and x is 13.