h penalty and his religion are related. Census (2015) results showed that 80% are Catholics, 6% are Islam, 2.6% Iglesia ni Kristo, 2.4% Evangelicals, 9.4% Other Religions. The researcher then sel
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Examples of Quota Sampling
1. If your population consists of 45% female and 55% males, the
sample should reflect those percentages.
2. The researcher is investigating views on the death penalty. He
believes that a person’s view on death penalty and his religion are
related. Census (2015) results showed that 80% are Catholics,
6% are Islam, 2.6% Iglesia ni Kristo, 2.4% Evangelicals, 9.4%
Other Religions. The researcher then selects a sample reflecting
the same proportions to represent the five groupings to the
discretion of the interviewers.
Are the results of the surveys reliable and unbiased?
Can we generalize the results for the entire population?
Step by step
Solved in 2 steps
- you may need to use the appropriate appendix table or technology to answer this question. The gap between the earnings of men and women with equal education is narrowing but has not closed. Sample data for seven men and seven women with bachelor's degrees are as follows. Data are shown in thousands of dollars. Men Women 30.6 42.5 86.5 46.4 56.2 31.9 68.2 40.5 45.2 36.8 57.9 51.5 66.3 22.8 (a) What is the median salary (in $) for men? For women? men$57900 women$40500 (b) Use ? = 0.05 and conduct the hypothesis test for identical population distributions. State the null and alternative hypotheses. H0: Median salary for men − Median salary for women > 0Ha: Median salary for men − Median salary for women = 0H0: Median salary for men − Median salary for women ≤ 0Ha: Median salary for men − Median salary for women > 0 H0: The two populations of salaries are not identical.Ha: The two populations of salaries are identical.H0: Median salary for men − Median…The Party of Nonvoters From past elections, nonvoters are those who are either not registered to vote or are considered unlikely to vote in an upcoming election. Nonvoters are very different demographically from likely voters.Nonvoters are more racially and ethnically diverse. 43% of those who are not likely to cast a ballot are Hispanic, African or other racial and ethnic minorities, roughly double the percentage amoung likely voters(22%) (Source: Pew Research Center, October, 2014, "The Party of Nonvoters"). Suppose you interview 10 people who are considered nonvoters. Round answers to 4 decimal places.a.) What is the probability that 5 of them are an ethnic minority? b.) What is the probability that more than 8 are an ethnic minority? c.) What is the probability that at least 8 are not an ethnic minority? d.) What is the probability that fewer than 5 are not an ethnic minority?1. A researcher is interested in choice and decisions. He looks at what people buyfor lunch in a university cafeteria. Which of the following best describes the data hecollects? a. He collects favorite lunch meal which is qualitative. He also collects data on how often each person buy that meal, which is also qualitative data. b. He collects how often participants buy their favorite meal, and this is a form of quantitative data.c. He asks participants to name their most frequently purchased meal, and this is qualitative data.d. He asks participants to tell him how many times a week they skip lunch because of their work, and this is qualitative data.
- 2. Are attitudes toward shopping changing? Sample surveys show that fewer people enjoy shopping in stores than in the past. A recent survey asked a random sample of 2500 U.S. adults if they agreed or disagreed with the statement, "I prefer to shop for clothes online rather than in a store." In this survey, 1575 agreed. A manager of a local clothing store claims that 60% of all U.S. adults would say "Agree" if asked the same question. (a) What is the sample proportion of U.S. adults who agreed with the statement? (b) If the manager's claim is true, what is the probability that the proportion in a random sample of 2500 U.S. adults is at least as far above 0.60 as the results of this survey? (c) Based on your answer in part (b), do you have reason to doubt the manager's claim?A website posts evaluations on airlines. It posts the most positive and the most negative comments for each airline. Discuss the usefulness of this feedback for a reader wanting to know about the airline. Choose the correct statement below. Select all that apply. A. The reader cannot accurately assess the airline because the method of choosing the sample is unclear. B. The reader can accurately assess the airline based on the posted evaluations. C. The reader cannot accurately assess the airline without reading all of the evaluations. D. The reader cannot accurately assess the airline because the evaluations posted are not necessarily representative of all the evaluations.The Student Union President conducted a survey to estimate the proportion of first year students who participated in the social activities organized by the Student Union. Which of the following surveying options does NOT affect the presidents ability to generalize the survey to all first year students. The president put the survey on the Student Union webpage a Monday and collected the responses at the end of the week. All of the other options present a problem for generalizing the results. The president polled all students coming out of the Student Union on a given Monday. The freshmen class consists of 3000 students. A random sample of only 300 were sent a survey. Only 150 responded. The survey was sent only to first year students enrolled in statistics courses because all students need to satisfy a statistics general education requirement.
- Holiday Blues. A poll was conducted by Opinion Research Corporation to estimate the proportions of men and women who get the “holiday blues.” Identify the a. specied attribute.b. two populations.c. two population proportions.d. two sample proportions.e. According to the poll, 34% of men and 44% of women get the “holiday blues.” Are the proportions 0.34 and 0.44 sample proportions or population proportions? Explain your answer.The school counselor needs to meet with students who have more than three absences. Here is some of the data about the students. Student name Homeroom teacher Absences Arianna Mr. Shea 4 Priyanka Ms. Hartley 4 Vivek Ms. Cowan 6 Suraj Mr. Rankin 5 Julia Ms. Andersen 6 ... ... ... The individuals in this data set are: Choose 1 answer: Choose 1 answer: (Choice A) A Homeroom teachers (Choice B) B School counselors (Choice C) C Students This data set contains: Choose 1 answer: Choose 1 answer: (Choice A) A 222 variables, 111 of which is quantitative (Choice B) B 222 variables, 222 of which are quantitative (Choice C) C 555 variables, 111 of which is quantitative (Choice D) D 555 variables, 333 of which are quantitativeWhich statement is true with regard to non-response bias? 1.Respondents have strong opinions about the subject matter. 2.Respondents change their answers to influence the results. 3.Respondents give the answer they think the questioner wants. 4.Respondents do not give their honest opinion.
- The Monterey Bay Aquarium, founded in 1984, is situated on the beautiful coast of Monterey Bay in the historic Cannery Row district. In 1985, the aquarium began a survey program that involved randomly sampling visitors as they exit for the day. The survey included visitor demographic information, use of social media, and opinions on their aquarium visit. For each visitor sampled during 2013-2015, the distribution of the number of children in their group is given. Number of Children 0 1 2 3 or more 2013 1855 585 599 515 Year 2014 2015 1751 1998 636 591 601 483 506 289 To access the complete data set, click the link for your preferred software format: CSV Excel JMP Mac-Text Minitab14-18 Minitab18+ PC-Text R SPSS TI CrunchIt! In this exercise, we will answer the question of whether there a significant difference in the distribution of the number of children in the group over this three-year period, and if so, how the distribution has changed. SOLVE: Create a graph of the data using…In 2015, Addison Group and Kelton surveyed the work preferences and attitudes of 948 working adults spread over three generations - Baby Boomers, Generation X, and Millennials (Society for Human Resource Management website). One question asked individuals if they would leave their current job to make more money at another job. The file Millennials contains the sample data, which is also summarized in the following table. Click on the datafile logo to reference the data. DATA file Leave Job for More Money? Yes No What is the p-value? Use Table 3 of Appendix B. The p-value is less than 0.005 Using a 0.05 level of significance, what is your conclusion? Conclude interest in leaving job for more money is Baby Boomer 122 191 Generation Generation X 141 176 Conduct a test of independence to determine whether interest in leaving a current job for more money is independent of employee generation. Compute the value of the x² test statistic (to 2 decimals). Do not round your intermediate…A J.D. Power and Associates vehicle quality survey asked new owners a variety of questions about their recently purchased automobile. One question asked for the owner's rating of the vehicle using categorical responses of average, outstanding, and exceptional. Another question asked for the owner's education level with the categorical responses some high school, high school graduate, some college, and college graduate. Assume the sample data below are for 500 owners who had recently purchased an automobile. Education Quality Rating Some HS HS Grad Some College College Grad Average 30 30 20 60 Outstanding 50 50 50 90 Exceptional 20 20 30 50 a. Use a 0.05 level of significance and a test of independence to determine if a new owner's vehicle quality rating is independent of the owner's education. Compute the value of the x test statistic (to 2 decimals). Use Table 3 of Appendix B to find the p-value. The p-value is - Select your answer - What is your conclusion? - Select your answer - v…
