1. Identify the type of bias that might result in each of the following scenarios.a) During a televised debate, politicians are askedif they have ever cheated on their taxes.b) A survey asks, "What is your favourite TV show:Game of Thrones, Big Bang Theory, or The Walking Dead?"c) Shoppers Drug Mart customers are asked to completean on-line survey when they arrive home from the store.2. We discussed several types of sampling in class. Indicate the type of sampling methodbeing used in each of the following scenarios.a) Choosing 30 girls and 20 boys to complete a surveybecause the population is 60% female and 40% male.b) Asking only people who walk past your surveystation their views on animal rights.c) Rolling Stone magazine asks its on-line readers,"What is the greatest rock song of all time?"_d) Five student names are drawn from a hat as ameans of representing a school at a leadership convention.e) Every 30th student on an alphabetize school list isasked to complete a questionnaire.

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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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Telemarketers continue to attempt to reach consumers by calling land-line phone numbers.According to estimates from a national 2003 survey, based on face-to-face interviews in 16,677 households,approximately 58.2% of U.S. adults have both a landline in their residence and a cell phone, 2.8% have only cellphone service but no landline, and 1.6% have no telephone service at all. (a) Polling agencies won't call cell phone numbers because customers object to paying for suchcalls. What proportion of U.S. households can be reached by a landline call?(b) Are having a cell phone and having a landline independent?
Please advise. Keep on tossing a coin until one gets a head. List 2 possible outcomes from this sample.
None
17- text __________is defined as the process that generates or provides an outcome. a. Experiment b. Sample point c. Sample space d. All
Drug tests Major League Baseball tests players to seewhether they are using performance-enhancing drugs.Officials select a team at random, and a drug-testing crewshows up unannounced to test all 40 players on the team.Each testing day can be considered a study of drug use inMajor League Baseball.a) What kind of sample is this?b) Is that choice appropriate?
Timing. In August 2011, a Sodahead.com voluntaryresponse poll asked site visitors, “Obama is on VacationAgain: Does He Have the Worst Timing Ever?” 56% ofthe 629 votes were for “Yes.” During the week of thepoll, a 5.8 earthquake struck near Washington, D.C., andHurricane Irene made its way up the East coast. Whattypes of bias may be present in the results of the poll?
Five state officials are listed to the right. Lieutenant Governor (L) Secretary of State (S) Attorney General (A) Representative (R) Press Secretary (P) a. List the 10 possible samples (without replacement) of size 3 that can be obtained from the population of five officials. b. If a simple random sampling procedure is used to obtain a sample of three officials, what are the chances that it is the first sample on your list in part (a)? the second sample? the tenth sample? a. List all 10 possible samples (without replacement) of size 3. Use the letter abbreviation for each official. (Use a comma to separate answers as needed.) b. What is the chance that the first sample in your list is selected? Type an exact answer.) What is the chance that the second sample in your list is selected? Type an exact answer.) What is the chance that the tenth sample in your list is selected? (1)
Random digit dialing telephone surveys used to exclude cell phone numbers. If the opinions of people who have only cell phones differ from those of people who have landline service, the poll results may not represent the entire adult population. The Pew Research Center interviewed separate random samples of cell-only and landline telephone users who were less than 30 years old. Here’s what the Pew survey found about how these people describe their political party affiliation. Do we reject, or fail to reject, the null hypothesis?
3. In a multiple-choice test, each question has 4 options, and a student randomly guesses the answers. If there are 10 questions, what is the probability that the student gets exactly 5 correct answers?
e E Knowledge Check www-awu.aleks.com More than one teacher has given the following advice: choose answer C when blindly guessing among four answers in a multiple choice test, ? since C is more often the correct answer than either A, B, or D. Suppose that we take a random sample of $40 correct answers from multiple-choice tests for introductory college courses and obtain the information summarized by the first row of numbers in the table below. These numbers are the observed frequencies for the categories A, B, C, and D for our sample of 540 correct answers. The second row of numbers contains the frequencies expected for a sample of 540 correct answers if a correct answer is equally likely to be A, B, C, or D. The bottom row of numbers contains the following value for each of the correct answer categories A, B, C, and D. (fo-fx) (Observed frequency-Expected frequency) SE Expected frequency Send data to Excel) Observed frequency fo Part 1 Fill in the missing values in the table. Round…
Hi, could someone please help with this? 1. Which is an important aspect of a randomized survey's design?A. The survey should always contain at least 5 questions.B. Each survey question should have at most 3 choices.C. The survey participants should be randomly selected.D. The survey should have questions for multiple populations.2. Identify the leading question.A. How much would you be willing to pay for a new living room furniture set?B. During what time of day are you most likely to watch TV?C. How interested would you be in purchasing a blue car?D. How much did you enjoy your great experience at our waterpark?3. Frederick is creating a plan to conduct a randomized survey. He will be asking guests at a baseball stadium to rate their experience. At which location should he take the survey to ensure randomization?A. the section of seats directly behind home plateB. the hot dog standC. the stadiums front gateD. the gift shop

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