Determine whether the sampling method described below appears to be sound or is flawed. In a survey of 337 subjects,each was asked about the importance of the appearance of a job applicant. The survey subjects were human resourceprofessionals who randomly selected by pollsters from a reputable market research firm. It is flawed because it is from asmall sample. It appears to be sound because it is a census. It is flawed because it is a voluntary response sample. Itappears to be sound because the data are not biased in any way.

It is given that the number of surveyed individuals is 337.The survey includes human resources…

Answered: Determine whether the sampling method…

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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A coach is interested in how many slam dunks the average college freshman at his university can do. Ten volunteers from the senior class step forward. After observing their performance, the coach concluded that college seniors can do an average of 10 slam dunks in a row without missing. what is the sample? what is the population?
QuickVote. TalkBack Live, a production of CNN, conducted on-line surveys on various issues. One survey, called a QuickVote, of 680 people asked “Would you vote for a third-party candidate?” Of the 680 people surveyed, 608 (89.4%) responded “yes” and 72 (10.6%) responded “no.” Beneath the vote tally, the following statement regarding the sampling procedure was found: This QuickVote is not scientific and reflects the opinions of only those Internet users who have chosen to participate. The results cannot be assumed to represent the opinions of Internet users in general, nor the public as a whole. The QuickVote sponsor is not responsible for content, functionality or the opinions expressed therein. Discuss the preceding statement in light of what you have learned
Suppose you recruit the next 100 people who visit the DCC cafeteria to participate in a survey. One of the questions you ask is whether the student eats on campus (i.e., in the cafeteria) regularly, and you want to use the sample proportion to estimate the value of the (population) proportion of all DCC students who eat on campus regularly. Do you think this sampling method is likely to be biased? If so, in which direction? This sampling method is not likely to be biased and will produce a representative sample of DCC students. This sampling method is biased and is likely to yield an overestimate for the population proportion. This sampling method is biased and is likely to yield an underestimate for the population proportion.
A political campaign wants to estimate the number of adult residents who voted in the last city election. Answer the following. (a) Which of the following surveys probably would best represent the entire adult population of the city? 50 senior residents are randomly selected; 42 voted in the last election. 50 adult residents are randomly selected from the city; 25 voted in the last election. 50 business owners are randomly selected; 38 voted in the last election. (b) There are 16,800 adults who live in the city. Using your answer from part (a), estimate the number of adults who voted in the last city election. adults
Telephone surveys may use a telephone directory to identify individuals for study. Speculate on the type of household that would be uncovered by using this sampling frame
If you were conducting a survey to find out how many of your fellow students approved of the state providing free community college tuition, what method of sampling would you use and why?
A hockey coach wants to show that there is no relationship between player attitudes about their most recent loss and the career choice of their father. What sampling method is the hockey coach using?
You are interested in the percentage of people in your city who favor tax cuts. You interview every twentieth person as they leave the church in your neighborhood. Determine what type of bias the study involves.
The city council of Pine Bluffs is considering increasing the number of police in an effort to reduce crime. Before making a final decision, the council asked the chief of police to survey other cities of similar size to determine the relationship between the number of police and the number of crimes reported. The chief gathered the following sample information. City Police Number of Crimes City Police Number of Crimes Oxford 13 13 Holgate 14 5 Starksville 14 12 Carey 11 16 Danville 20 5 Whistler 9 20 Athens 23 7 Woodville 18 6 Click here for the Excel Data Filea. Determine the regression equation. (Negative amounts should be indicated by a minus sign. Round your answers to 4 decimal places.) b. Estimate the number of crimes for a city with 24 police officers. (Round your answer to the nearest whole number.) c. Interpret the regression…
Sierra College students enrolled in an online Elementary Statistics course were asked to participate in an anonymous onlne survey. The survey asked the students "Which type of device will you primarily use to access your online course in Canvas?". Of the 152 students who answered this question, 20 responded "a desktop computer", 121 responded "a laptop computer", 6 responded "a smartphone", and 5 responded "a tablet". The Sierra College Mathematics Department believes that less than 5% of students enrolled in an online Elementary Statistics course primarily uses a smartphone to access their online course in Canvas. Use the data collected in the survey to conduct a hypothesis testing procedure to test this belief. What conclusion should be reached according to the results of this hypothesis test?
Determine the sampling method used in the following situation: A political party wants to know the reaction of voters to a debate between the candidates. The day after the debate, the party's polling staff used a statistical software to generate 1,300 phone numbers. The staff called the numbers, and if a registered voter answers the phone, or is available to come to the phone, that registered voter is asked whom they intend to vote for, and whether the debate changed their opinion of the candidates. Simple Random Sampling Systematic Sampling SUBMIT QUESTION SAVE PROGRESS All folders are up to date 70 Connected to: Microsoft Exchange SUBMIT ASSI
Suppose you are hired to design how to implement a survey to try to predict who will win the race for mayor in the city of Modesto. While someone else will be writing the survey questions, you are in charge of making sure that the sampling method is not biased (otherwise the results are invalid). You decide to use stratified sampling to get a sample that represents the population. You are told that you need to subdivide the population into four or more subgroups. 1. Describe how you will subdivide the population into four or more subgroups. Explain. 2. Explain how you will be choosing the people that will be part of your sample.

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