A poll of n voters is to be taken in an attempt to predict the outcome of a by-election in a certain riding. Specifically, you are interested in the proportion of voters that will votefor a certain candidate, Candidate An = 430 voters have been randomly chosen, each has indicated what candidate they will vote for. You are to count the number, out of 430, who say they will vote for Candidate A.This count is measured by the random variable X. You find X = 169.(a) Find a 94% confidence interval for p, the proportion of all voters who will vote for Candidate A. Use at least four decimal points for your lower and upper bounds.Lower Bound-Upper Bound=(b) Interpret the meaning of the interval you found in part (a).The proportion of ?✓that will vote for Candidate A is?>% and%. (Enter your answer to at least two decimals.)

Answered: A poll of n voters is to be taken in an…

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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After once again losing a hockey game to the Michigan Tech,the alumini association of NMU conducted a survey to see if alumini were in favour of firing the coach.A simple random sample of 100 alumini from the population of all living alumini was taken .Sixty-four of the alumini in the sample were in favour of firing the coach.Let p represent the proportion of all living alumini who favor firing the coach. what is a 99% confidence interval for p?
Hypnosis. A sample of 100 people was separated into children and adults. The members of each group were randomly assigned to two different hypnosis exercises. The responses of each person were recorded at the completion of the experiment
2. In a population it is estimated that 20% have a desired trait of interest for the researcher. The researcher wants to know how many people on average he has to draw from a population to get 2 people with the trait. Use rows 20-24 of the Random Number Table to carry out the simulation. Explain clearly how you set up the problem and report your findings. Answer:
Superpowers A total of 415 children from the United Kingdom and the United States who completed a survey in a recent year were randomly selected. Each student's country of origin was recorded along with which superpower they would most like to have: the ability to fly, ability to freeze time, invisibility, superstrength, or telepathy (ability to read minds). The data are summarized in the following table. Country U.K. U.S. Fly 54 45 Freeze time 52 44 Invisibility 30 37 Superpower 20 23 Superstrength Telepathy 44 66 a. What proportion of students in the sample are from the United States? b. Find the distribution of superpower preference for the students in the sample using relative frequencies. c. What percent of students in the sample are from the United Kingdom and prefer telepathy as their superpower preference?
Let p be the population proportion of successes, where a success is an adult in the country who would travel into space on a commercial flight if they could afford it. State H0 and Ha. Select the correct choice below and fill in the answer boxes to complete your choice. (Round to two decimal places as needed.)
A recent poll indicates that 48% of all registered voters in America plan to vote for a specific candidate in the upcoming presidential election. Suppose a random sample of 20 Americans is taken. Let X represent the sample count who plan to vote for the candidate. What is P(X≠5)?
When X is a binomial random variable, the mean of the probability distribution = np. A jury has 12 people on the jury. If a certain town has a population that is 9 percent a certain race, how many people of that race would you expect would be on the jury if jury selection was random (and every person was equally likely to be on the jury). Round answers to 4 decimal places as needed.
Dominique, Marco, Clarice, John, and Roberto work for a publishing company. The company wants to send two employees to a statistics conference. To be fair, the company decides that the two individuals who get to attend will have their names randomly drawn from a hat (a) Determine the sample space of the experiment. That is, list all possible simple random samples of size n=2. (b) What is the probability that Dominique and Clarice attend the conference? (c) What is the probability that Marco attends the conference? (d) What is the probability that Roberto stays home? (a) Choose the correct answer below. Note that each person is represented by the first letter in their name. O A. DM, DC, DJ, DR, MC, MJ, MR, CJ, CR, JR, DD, MM, CC, JJ, RR O B. DM,DC DJ,DR,MC,MJ,MR,CJ,CR JR,MD.CD,JD,RD CM, JM,RM JC RC RJ OC. DM, DC, DJ, DR, MC, MJ, MR, CJ, CR, JR O D. DM, DC, DJ, DR (b) The probability that Dominique and Clarice attend the conference is (Round to one decimal place as needed ) (c) The…
A small liberal arts college in the Northeast has 350350 freshmen. Seventy of the freshmen are education majors. Suppose fifty freshmen are randomly selected (without replacement). Step 1 of 2: Find the expected number of education majors in the sample. Round your answer to two decimal places, if necessary.
There are 20 different pairs of shoes. Pick at random 10 shoes. Let X be the number of paired shoes, M be the number of shoes that are left-foot, N be the number of shoes that are right-foot. (a) Find the distribution of X. Show your problem-solving process (not just the final answer) with a few sentences of explanation and give the formula (b) Let Y = M – N. Give all possible values of Y. Find the distribution of Y. Show your problem-solving process (not just the final answer) with a few sentences of explanation and give the formula. (c) let Z = |Y|, compute E(X), Var(X), E(Z) and Var(Z). Show your problem-solving process (not just the answer), keep 2 decimal places for E(X) and E(Z), and use the approximate values for the calculations of Var(X) and Var(Z).

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