A court has jurisdiction over five countries, and of the people eligible for jury duty, 14% reside in country A, 22%reside in country B, 35% reside in country C, 16% reside in country D, and 13% reside in country E. The followingtable gives the residential locations of the jurors selected over a five-year period. Is there any evidence that thejurors have not been selected at random from the eligible population?CountyABCDNumber of Jurors152235321119137

From the information, given thatThe claim is to test whether there is evidence that the jurors have…

Answered: A court has jurisdiction over five…

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 429 people is selected. The people are classified according to place of residence ("urban", "suburban", or "rural"). They are also classified according to highest educational degree earned ("no college degree", "two-year degree", "four-year degree", or "advanced degree"). The results are given in the contingency table below. No college degree Two-year degree Four-year degree Advanced degree Urban 20 46 25 17 Suburban 35 46 24 48 Rural 48 32 40 48 Among the people in the sample who have an advanced degree, what is the relative frequency of those whose place of residence happens to be rural? Round your answer to two decimal places.
6 out of 20 people in a business have a language certificate. Accordingly, how many of 10 randomly selected people should have a language certificate?
Current job status Employed Unemployed 16. Employment program A city council must decide whether to fund a new "welfare-to-work" program to assist long-time unemployed people in finding jobs. This program would help clients fill out job applications and give them advice about dealing with job interviews. A six- month trial has just ended. At the start of this trial a number of unemployed residents were randomly divided into two groups; one group went through the help program and the other group did not. Data about employment at the end of this trial are shown in the table. Should the city council fund this program? Test an appropriate hypothesis and state your conclusion. Group 1 (Help program) 20 34 Group 2 13 (No help) 33
In a survey of 233 people about the operating systems of various devices that they use (cell phone, tablet, laptop, etc.), the following results were obtained: 146 people use an Android device 150 people use an Apple device 79 people use Android and Apple devices 77 people use Android and Windows devices 67 people use an Apple device, but no Windows device 32 people use Android, Apple, and Windows devices 8 people use devices that are not Android, not Apple, and not Windows How many people use a Windows device?
18 The government of large large city needs to determine whether the city citizens residents Will support the addition of another fire house. The government decides to conduct a survey of a sample of the cities residents. Which one of the following procedures would be the most appropriate for obtaining a sample of the city’s residents? Choose the best answer A. Survey a random sample of the firemen who currently work in the city. B. Survey every fifth person to enter the local church on Sunday. C. surveyed the last hundred00 residents listed in the telephone directory. D. Survey a random sample of person within each neighborhood.
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. A marine biologist measures the effectiveness of mating displays among tortoises in one of six environmental conditions. Ten tortoises are randomly assigned to each condition. (for this item, also give the degrees of freedom) b. A neuropsychologist measures the behavioral response to electrical stimulation in one of five brain regions. c. A sociologist records the number of children born in a local village each season (spring, summer, fall, winter) in a single year. d. A social psychologist has participants rate the likability of a person described as having one of three types of leadership styles. The breakdown of leadership styles is 25 autocratic, 25 bureaucratic, and 25 democratic. (for this item, also give the degrees of freedom) For items (a) – (d) identify the following: k? N? n? (assumed equal size groups)? What is the decision at 0.05 level of significance for each of the following tests? Are post hocs necessary? a. F(3, 28) = 3.00 b. F(1, 40) = 4.98 c. F(4, 30) = 2.72 d.…
Drug tests Major League Baseball tests players to seewhether they are using performance-enhancing drugs.Officials select a team at random, and a drug-testing crewshows up unannounced to test all 40 players on the team.Each testing day can be considered a study of drug use inMajor League Baseball.a) What kind of sample is this?b) Is that choice appropriate?
5. The Department of Health in a major US city is concerned about the reported number of COVID-19 cases in the school system. There are 1,722 schools in the city. The department of health selects an SRS of 256 schools and conducts testing at each one. Which of the following best describes the sample in this context? a. The 256 schools tested. b. All schools in the US c. All covid-19 cases d. All schools in the city
Homecoming. A college Statistics class conducted a survey concerning community attitudes about the col-lege’s large homecoming celebration. That survey drew its sample in the following manner: Telephone numberswere generated at random by selecting one of the localtelephone exchanges (first three digits) at random andthen generating a random four-digit number to followthe exchange. If a person answered the phone and thecall was to a residence, then that person was taken to bethe subject for interview. (Undergraduate students andthose under voting age were excluded, as was anyonewho could not speak English.) Calls were placed until asample of 200 eligible respondents had been reached.a) Did every telephone number that could occur in thatcommunity have an equal chance of being generated?b) Did this method of generating telephone numbersresult in a simple random sample (SRS) of localresidences? Explain.c) Did this method generate an SRS of local voters?Explain.d) Is this method unbiased in…
A sample of 427 people is selected. The people are classified according to place of residence ("urban", "suburban", or "rural"). They are also classified according to highest educational degree earned ("no college degree", "two-year degree", "four-year degree", or "advanced degree"). The results are given in the contingency table below. No college degree Two-year degree Four-year degree Advanced degree Urban 34 47 29 48 Suburban 37 25 34 22 Rural 44 29 34 44 What is the relative frequency of people in the sample whose place of residence is urban and who do not have a college degree? Round your answer to two decimal places.
Describe matched-pair design experiments. Which of these statements best describes a matched-pair design? a.) A design in which an entire sample is divided into pairs, and then the pairs are matched together at random. b.) A design in which the total population is randomly divided into groups of equal size and a treatment is assigned to each group. c.) A design in which only two treatments are tested on pairs of similar subjects. d.) A design in which the total population is divided into homogeneous blocks and a treatment is assigned to every element of the block.

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