Residents of a community currently pay a fee for recreational services in their neighborhood, such as tennis courts,running trails, and a pool. To assess whether there is support for raising the fee for the upcoming summer, a randomsample of 50 residents is contacted and asked this question: "Would you support a $10 increase in the recreationalfee to support programs for the health and well-being of children in the community?" Of the 50 residents contacted,42 approved of the fee increase. Which statement describes a likely source of bias present in the survey results?O There may be little bias in the results because a random sample of residents was taken.O Question wording bias may be present because the question leads those responding toward a certain response.O Nonresponse bias may be present because many who support the fee increase may choose to not respond.O Undercoverage bias may be present because some parts of the community may not be represented in the surveyresults.DeMark this and returnSave and ExitNextSubmit69°F近

Here our aim was to assess whether there is a support for raising the fee for the upcoming summer…

Answered: Residents of a community currently pay…

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 mayor running for re-election claims that during his term, average municipal taxes have fallen by $225. A conscientious statistician wants to test this claim. She surveys 37 of her neighbors and finds that their taxes decreased (in dollars) as follows: 239, 231, 221, 213, 237, 213, 225, 240, 238, 217, 226, 221, 189, 189, 222, 219, 219, 226, 209, 225, 243, 223, 248, 258, 221, 234, 267, 225, 225, 217, 215, 236, 245, 241, 256, 226, 220 The statistician assumes a population standard deviation of $14. Do you think the statistician should reject the mayor's claim? Why or why not? Step 1: State the hypothesis. ? v = Step 2: Determine the Features of the Distribution of Point Estimates Using the Central Limit Theorem. By the Central Limit Theorem, we know that the point estimates are Select an answer with distribution mean and distribution standard deviation Step 3: Assuming the Claim is True, Find the Probability of Obtaining the Point Estimate. P( ? ♥ P(? v ? v Step 4: Make a Conclusion…
A mayor running for re-election claims that during his term, average municipal taxes have fallen by $175. A conscientious statistician wants to test this claim. She surveys 44 of her neighbors and finds that their taxes decreased (in dollars) as follows:198, 202, 166, 184, 167, 167, 187, 129, 178, 166, 158, 172, 142, 187, 188, 199, 192, 165, 191, 199, 188, 156, 195, 165, 165, 179, 208, 158, 228, 175, 177, 161, 168, 189, 151, 177, 146, 190, 185, 162, 163, 177, 170, 163The statistician assumes a population standard deviation of $18. Do you think the statistician should reject the mayor's claim? Why or why not?Step 1: State the hypothesis. p =?or u=? Step 2: Determine the Features of the Distribution of Point Estimates Using the Central Limit Theorem.By the Central Limit Theorem, we know that the point estimates are normal distribute or t distribute ? with distribution mean ? and distribution standard deviation ?
1. Fill in the blanks for each of the statements below. а. A survey of 1000 U.S. adults found that 40% think the internet is the best way to get news and information. Population: Sample: Variable of Interest: Type of Data (Qualitative or Quantitative): Is the 40% a parameter or statistic, and why? b. A survey of the 55 law firms in a local city found that the average hourly billing rate is $425. Population: Sample: Variable of Interest: Type of Data (Qualitative or Quantitative): Is the $425 a parameter or statistic, and why?.
Agnes Hammer is a senior majoring in management science. She has been interviewing with several companies for a job when she graduates, and she is curious about what starting salary offers she might receive. There are 140 seniors in the graduating class for her major, and more than half have received job offers. She asked 12 of her classmates at random what their annual starting salary offers were, and she received the following responses: $28,500 $35,500 32,600 36,000 34,000 25,700 27,500 29,000 24,600 31,500 34,500 26,800 Assume that starting salaries are normally distributed. Compute the mean and standard deviation for these data and determine the probability that Agnes will receive a salary offer of less than $27,000.
A conservative radio talk show host with a large audience is interested in the proportion p ofadults in his listening area who think the drinking age should be lowered to eighteen. To findthis out, he poses the following question to his listeners: “Do you think that the drinking ageshould be reduced to eighteen in light of the fact that eighteen year‐olds are eligible for militaryservice?” He asks listeners to phone in and vote “Yes” if they agree the drinking age should belowered and “No” if not. Of the 100 people who phoned in, 70 answered “Yes.” a. List one source of sampling bias (i.e. bias based on the people included in the sample). b. List another source of bias (sampling or non-sampling).
Cable TV choices: A telecommunications company provided its cable TV subscribers with free access to a new sports channel for a period of one month. It then chose a sample of 415 television viewers and asked them whether they would be willing to pay an extra $10 per month to continue to access the channel. A total of 25 of the 415 replied that they would be willing to pay. The marketing director of the company claims that less than 10% of all its subscribers would continue subscribing. Can you conclude that the director's claim is true? Use the α = 0.01 level of significance with the P-value method and Excel.
The director of library services at a college did a survey of types of books (by subject) in the circulation library. Then she used library records to take a random sample of 888 books checked out last term and classified the books in the sample by subject. The results are shown below. Subject Area Percent of Books on Subject in CirculationLibrary on This Subject Number of Books inSample on This Subject Business 32% 247 Humanities 25% 209 Natural Science 20% 222 Social Science 15% 127 All other subjects 8% 83 Using a 5% level of significance, test the claim that the subject distribution of books in the library fits the distribution of books checked out by students. (a) What is the level of significance?State the null and alternate hypotheses. H0: The distributions are the same.H1: The distributions are different.H0: The distributions are different.H1: The distributions are different. H0: The distributions are the same.H1: The distributions are the same.H0: The…
Cheaters, study components: Researchers studying the relationship between honesty, age, and self-control conducted an experiment on 160 children between the ages of 5 and 15. Participants reported their age, sex, and whether they were an only child or not. The researchers asked each child to toss a fair coin in private and to record the outcome (white or black) on a paper sheet, and said they would only reward children who report white. Half the students were explicitly told not to cheat and the others were not given any explicit instructions. In the "no instruction" group the probability of cheating was found to be uniform across groups based on a child's characteristics. In the group that was explicitly told to not cheat, girls were less likely to cheat, and while rate of cheating didn't vary by age for boys, it decreased with age for girls (Ritz et al. 2000). Identify the following a) What are the cases? b) What are the variables and their types? c) What is the main research…
From the given scenario, define the population proportion. In 2019, a national survey organization asked the question "Do you go on more than two vacations per year?" to a random sample of 2,000 Americans. 580 responded "Yes", while the other 1,420 people responded "No". Group of answer choices: A) the proportions of the sampled Americans who go on more than two vacations per year B) the proportion of all Americans who go on more than two vacations per year C) the 1,420 people who responded "No" D) the 2,000 Americans
The best way to increase the response rate of a mail survey is to: a. carefully select the respondents b. use a short questionnaire c. offer monetary incentives to respondents d. use one or more follow-up reminders
A construction company submitted a bid for a large, public construction project. The company’s management initially felt they had a 50-50 chance of getting the project. However, the department to which the bid was submitted subsequently requested additional information on the bid submitted by this company. Past experience indicates that for 75% of the successful bids but only for 40% of the unsuccessful bids the agency requested such additional information. Question: Given that the construction company was asked for additional information, what is the probability that it will get the project?
The director of library services at a college did a survey of types of books (by subject) in the circulation library. Then she used library records to take a random sample of 888 books checked out last term and classified the books in the sample by subject. The results are shown below. Subject Area Percent of Books on Subject in CirculationLibrary on This Subject Number of Books inSample on This Subject Business 32% 237 Humanities 25% 220 Natural Science 20% 223 Social Science 15% 128 All other subjects 8% 80 Using a 5% level of significance, test the claim that the subject distribution of books in the library fits the distribution of books checked out by students. (a) What is the level of significance?State the null and alternate hypotheses. H0: The distributions are the same.H1: The distributions are different.H0: The distributions are the same.H1: The distributions are the same. H0: The distributions are different.H1: The distributions are different.H0: The…

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