28) A study published in the American Journal of Public Health was conducted to determine whether theuse of seat belts in motor vehicles depends on ethnic status in San Diego County. A sample of 792children treated for injuries sustained from motor vehicle accidents was obtained, and each childwas classified according to (1) ethnic status (Hispanic or non-Hispanic) and (2) seat belt usage(worn or not worn) during the accident. The number of children in each category is given in thetable below.Seat belts wornSeat belts not wornHispanic31283Non-Hispanic148330Referring to these data, which of the following conclusions should be reached if the appropriate nihypothesis is conducted using an alpha = .05 level? Tuoria enolzubaos griwollet Jo bidw ,20, ofA) There is no relationship between whether someone is Hispanic and whether they wear a seatda srli to nabreg neowisd qilarrodslets al sistbelB) The use of seat belts and whether a person is Hispanic or not is statistically related.C) The mean value for Hispanics is the same as for Non-Hispanics.D) None of the above

28)Given that the observed frequencies of the different values of hispanic or not with seal belts…

Answered: 8) A study published in the American…

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 sample of 277 adults is selected. The adults are classified according to voter registration status ("registered" or "not registered"). They are also classified according to preferred source of current events information ("television", "newspapers", "radio", or "internet sites"). The results are given in the contingency table below. Television Newspajers Radio Internet sites Registered 25 29 44 41 Not registered 20 39 38 41 What is the relative frequency of adults in the sample who are registered to vote and prefer to obtain their information through radio? Round your answer to two decimal places.
A study identified Bridgeport, Connecticut, San Jose, California, Washington, D.C., and Lexington Park, Maryland as the four U.S. cities with the highest percentage of millionaires. The following data show the following number of millionaires for samples of individuals from each of the four cities. Millionaire Yes No Bridgeport, CT 49 451 % % O Ho: PB #PL# PN* PW = San Jose, CA % % 40 260 Ha: : Not all population proportions are equal. City (a) What is the estimate of the percentage of millionaires in each of these cities? (Round your answers to two decimal places.) Bridgeport, CT San Jose, CA Washington, D.C. Lexington Park, MD H₂: : All population proportions are equal. Washington, D.C. Lexington Park, MD O Ho: At least two of the population proportions are equal. Ha: : None of the population proportions are equal. (b) Using a 0.05 level of significance, test for the equality of the population proportion of millionaires for these four cities. State the null and alternative…
Find the estimate and the associated variance estimate for the population parameters in each of the following situation: a. Proportion of managers who like the policy. b. Proportion of clerical workers who like the policy. c. Proportion of wage earners who like the policy. 2 d. Difference between the proportion of managers who like the policy and the proportion of managers who dislike the policy.
Out of the four diagnose cells, how many demonstrate an observed cell count greater than what would be expected under independence between the neurologist ratings?
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.
This question refers to a survey of a university's faculty members on affirmative action policies for the university. The survey was based on telephone interviews with a random sample of 1,001 faculty members conducted in December 1995. One of the questions asked was, "Do you favor or oppose using race, religion, sex, color, ethnicity, or national origin as a criterion for admission to the university?" Of the 704 male respondents, 45% said "Favor," and of the 297 female respondents, 72% said "Favor." (a) Find the conservative margin of error (in %) for the male respondents. (Round your answer to one decimal place.) % Use the conservative margin of error to compute an approximate 95% confidence interval for the percent who favored this policy at the time of the poll in the population of male faculty members. (Round your answers to one decimal place.) (_,_)% , % (b) Find the conservative margin of error (in %) for the females. (Round your answer to one decimal…
I need help with number 8, 4, and 5. Thank you so much :)
9
A consumer survey was conducted to examine patterns in ownership of tablet computers, cellular telephones, and Blu-ray players. The following data were obtained: 311 people had tablet computers, 236 had cell phones, 265 had Blu-ray players, 65 had all three, 62 had none, 92 had cell phones and Blu-ray players, 57 had cell phones but no computers or Blu-ray players, and 108 had computers and Blu-ray players but no cell phones. (Round your answers to one decimal place.) A) What percent of people surveyed owned a cell phone? B) What percent of the people surveyed owned only a cell phone?
A sample of 239 adults is selected. The adults are classified according to voter registration status ("registered" or "not registered"). They are also classified according to preferred source of current events information ("television", "newspapers", "radio", or "internet sites"). The results are given in the contingency table below. Television Newspapers Radio Internet sites Registered 46 16 29 36 Not registered 31 20 32 29 What is the relative frequency of adults in the sample who prefer to obtain their information through newspapers? Round your answer to two decimal places.
A consumer survey was conducted to examine patterns in ownership of tablet computers, cellular telephones, and Blu-ray players. The following data were obtained: 315 people had tablet computers, 236 had cell phones, 265 had Blu-ray players, 69 had all three, 64 had none, 94 had cell phones and Blu-ray players, 55 had cell phones but no computers or Blu-ray players, and 104 had computers and Blu-ray players but no cell phones. (Round your answers to one decimal place.) (a) What percent of the people surveyed owned a cell phone? % (b) What percent of the people surveyed owned only a cell phone? %
A sample of 274 adults is selected. The adults are classified according to voter registration status ("registered" or "not registered"). They are also classified according to preferred source of current events information ("television", "newspapers", "radio", or "internet sites"). The results are given in the contingency table below. Registered X Not registered Television 30 35 Newspapers Radio 42 37 What is the relative frequency of adults in the sample who are not registered to vote? Round your answer to two decimal places. 0 37 33 Internet sites 16 44

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