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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9
An article reported that in a particular year, there were 717 bicyclists killed on public roadways in a particular country, and that the average age of the cyclists killed was 43 years. These figures were based on an analysis of the records of all traffic-related deaths of bicyclists on public roadways of that country. (a) Does the group of 717 bicycle fatalities represent a census or a sample of the bicycle fatalities for that year? O a census O a sample (b) If the population of interest is bicycle traffic fatalities for this particular year, is the given average age of 43 years a number that describes a sample or a number that describes the population? O a number that describes a sample O a number that describes the population
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?
10. For adults, certain type of cancers can be treated with multiple health interventions. To gain information about all Maryland-based treatment centers a survey is sent to a randomly chosen group of 25 Maryland based treatment centers that asks about the recommended interventions for cancer patients based on medical records, insurance, and income. All of the randomly selected treatment centers completed the survey. The sample is: For adults, certain type of cancers can be treated with multiple health interventions. To gain information about all Maryland-based treatment centers a survey is sent to a randomly chosen group of 25 Maryland based treatment centers that asks about the recommended interventions for cancer patients based on medical records, insurance, and income. All of the randomly selected treatment centers completed the survey. The sample is: a. the 25 Maryland-based treatment centers b. the medical records, insurance, and income c. all Maryland-based treatment…
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.
Q) A sample of 200 components is selected from the output of a factory that uses three different machines to manufacture these components. Each component in the sample is inspected to determine whether or not it is defective. The machine that produced the component is also recorded and the data is given below: Machine 1 2 3 Total Outcome Defective 8 6 12 26 Non-Defective 54 62 58 174 Total 62 68 70 200 Using a 0.05 level of significance, answer the following questions: i) Which statistical technique will be applied in this scenario? ii) Calculate Expected values of all the observed values. iii) Calculate the calculated value of the statistical technique you applied
We wish to determine whether there is a relationship between the gender of ateenager and their preferred brand of running shoes. A survey of 200teenagers produced the following results: Preferred BrandGender,Nike, Asics ,New Balance and TotalFemale nike24 ascis19 new balance59 total102 Male nike32 asics28 new balance38 total98 Total nike56 asics47 new balance97 total200 Perform an appropriate test at a 5% level of significance to determine whetherthere is a relationship between the gender of teenagers and the preferredbrand of running shoes.
5
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
b) A certain pay television company wishes to estimate the proportion of its customers who would purchase a pay television program guide. To do this, the company manager decides to select a random sample of customers and note the number who would purchase a program guide. Suppose that experience in other areas suggests that about 13% of customers will purchase a program guide. How many customers should the company manager include in his sample if he wishes to estimate the true proportion who will purchase the program guide correct to within 5% (0.05) with a confidence level of 95%?
1.Are the individuals and their environment controlled in an observational study? A.Yes B,No C.Partially D.Cannot say
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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