C10. In the 2013 ISSP, respondents in several European countries were asked their Jevelof agreement to the statement, “Immigrants take jobs away from people born in theircountry." Their responses (frequencies only) are presented below.ImmigrantsTake JobsCzechFranceDenmarkFinlandGermanyAwayRepublic25110893125Strongly agree648658310211245254Agree355490309309459NeitherDisagree190472325440616Disagree strongly40734210019940Total1,8911,9301,2951,1871,653 a. Is there a relationship between a respondent's country of residence and their level ofa.aagreement to the statement on immigrants?Could we characterize the relationship as positive or negative? Why or why note- Combining the strongly agree and agree categories, 69.1% (648 + 658/1,891) ofagree that immigrants take away jobs from those born in the Czech RepublicC.Czechsmuch higher than responses from other countries. What hypothesis can you offer toexplain the difference in responses?

a) For determining a relationship between two levels of categorical variables, the chi-square test…

Answered: a. Is there a relationship between a…

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 survey was conducted to determine whether hours of sleep per night are independent of age. A sample of individuals was asked to indicate the number of hours of sleep per night with categorical options: fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more. Later in the survey, the individuals were asked to indicate their age with categorical options: age 39 or younger and age 40 or older. Sample data follow. Age Group Hours of Sleep 39 or younger 40 or older Fewer than 6 38 36 6 to 6.9 60 57 7 to 7.9 76 74 8 or more 66 93 (a) Conduct a test of independence to determine whether hours of sleep are independent of age. (b) What is your estimate of the percentages of individuals who sleep fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more per night?
2. We want to investigate whether there exists gender bias on traffic stops by the police here in Charlotte. The Charlotte Open Data Portal includes information on different characteristics of drivers being stopped. We collected the data from 2017 and we are interested in answering the question: "Of all the drivers who are stopped, are female drivers less likely to get searched than male drivers? From the data collected we observed that 438 out of the 24,314 female drivers were searched, whercas 2,244 out of 34,095 male drivers were scarchcd. (a) that the proportion of female drivers being searched is smaller than the proportion of male drivers being searched? Is there sufficient evidence at the 0.05 significance level to conclude Construct the appropriate confidence interval for the hypothesis (b) test of part (a) and state your conclusion.
The Bureau of Labor Statistics reports that the official unemployment rate for Black people was 10.4% and 4.7% for White people in February 2015. Select all correct answers for this question. O The samples of white and black people are independent. The explanatory variable is the unemployment rate. The response variable is the unemployment rate. The response variable is race.
Astudy was conducted to determine the proportion of people who dream in black and white instead of color. Among 317 people over the age of 55, 63 dream in black and white, and among 300 people under the age of 25, 17 dream in black and white. Use a 0.01 significance level to test the claim that the proportion of people over 55 who dreamn tackand white is greater than the proportion for those under 25. Complete parts (a) through (c) below. a. Test the claim using a hypothesis test. Consider the first sample to be the sample of people over the age of 55 and the second sample to be the sample of people under the age of 25. What are the null and altenative hypotheses for the hypothesis test? OA. Ho P =P2 H, P P2 O B. Ho P1 SP2 H,: P, #P2 O C. Ho P1 #P2 H, P, = P2 O D. H, P1 =P2 H P P2 O E. H, P1 =P2 H,: P,
Statistical discrimination is: a preconceived bias, not based on reason or experience, against a group. O the use of observations about the average characteristics of a group to make inferences about an individual member of the group. a feeling of inferiority arising from membership in a small group. O judgments shaped by the unconscious attribution of particular qualities to specific groups.
1. The percentage of 12- to 17-year-olds who reported talking at least once in the past year with their parents about the dangers of drug, tobacco, or alcohol is 60% nationally. A state youth council believes this proportion is higher in their state, where there has been an intense media campaign about this issue. A survey of randomly chosen students from across the state shows 1032 of 1642 students reporting they are having these conversations with their parents. Is there evidence that the percent of students using drugs, tobacco or alcohol in this state is above the national rate?
Do ethnic group and gender influence the type of care that a heart patient receives? The following pas- sage is from the article “Heart Care Reflects Race and Sex, Not Symptoms” (USA Today, February 25, 1999, reprinted with permission):Previous research suggested blacks and women were less likely than whites and men to get cardiac cathe- terization or coronary bypass surgery for chest pain or a heart attack. Scientists blamed differences in illness severity, insurance coverage, patient preference, and health care access. The researchers eliminated those differences by videotaping actors—two black men, two black women, two white men, and two white women—describing chest pain from identical scripts. They wore identical gowns, used identical gestures, and were taped from the same position. Researchers asked 720 primary care doctors at meetings of the American College of Physicians or the American Academy of Family Physicians to watch a tape and recommend care. The doctors thought the…
What is the name of this hypothesis test? A state employee wishes to see if there is a significant difference in the number of employees at the interchanges of three state toll roads. Can it be concluded that there is a significant difference in the average number of employees at each interchange? Pennsylvania Turnpike: 7, 14, 32, 19, 10, 11 Greensburg Bypass: 10, 1, 1, 0, 11, 1 Beaver Valley Expressway: 1, 12,1, 9, 1, 11 Two Independent Samples t Test Paired Samples t Test O One Sample z Test Two Proportion z Test Linear Regression t Test Two Proportion z Test O Chi-Square Test for Independence O ANOVA One Proportion z Test O One Samplet Test O Chi-Square Goodness of Fit Test
4. Use a 0.05 significance level to test the claim that gender and left-handedness are independent. Male Female Left-handed 83 184 Right-handed 17 16
it did not accept that as an answer in this reading and participation question
Determine whether the study is an experiment or an observational study, and then identify a major problem with the study. In a survey, 1465 Internet users chose to respond to this question posted on a newspaper's electronic edition: "Is news online as satisfying as print and TV news?" 52% of the respondents said "yes." This is an ▼ observational study experiment because the researchers ▼ apply a treatment to do not attempt to modify the individuals. What is a major problem with the study? A. The sample is not very large. B. This is a convenience sample with voluntary response, which has a high chance of leading to bias. C. There is no blinding or replication, which has a high chance of leading to bias. D. The results apply only to Internet users.
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?

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