A sample of 277 adults is selected. The adults are classified according to voter registration status ("registered" or "not registered"). They are also classifiedaccording to preferred source of current events information ("television", "newspapers", "radio", or "internet sites"). The results are given in the contingencytable below.TelevisionNewspajersRadioInternet sitesRegistered25294441Not registered20393841What 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.

For the given table find Relative frequency of registered to vote and prefer radio

Answered: A sample of 277 adults is selected. The…

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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The director of the MBA program at Salterdine University wants to develop a procedure to determine which applicants to admit to the MBA program. The director believes that an applicant’s undergraduate grade point average (GPA) and score on the GMAT exam are helpful in predicting which applicants will be good students. To assist in this endeavor, the director asked a committee of faculty members to classify 70 of the recent students in the MBA program into two groups: (1) good students and (2) weak students. The file MBAStudents.xlsm summarizes these ratings, along with the GPA and GMAT scores for the 70 students. What are the coordinates of the centroids for the good students and the weak students? Use XLMiner’s standard data partition command to partition the data into a training set (with 60% of the observations) and validation set (with 40% of the observations) using the default seed of 12345. Use discriminant analysis to create a classifier for this data. How accurate is this…
The number of people voting LAKAS or KAMPI below the age of 40 and 40 plus in a random sample of 30 voters in a city is given in contingency table below. Is voting LAKAS or KAMPI independent of the voter being below the age of 40 or 40 plus in this city at the 5% level of significance?
According to the National Institute on Alcohol Abuse and Alcoholism (NIAAA) and the National Institutes of Health (NIH), 41% of college students nationwide engage in "binge-drinking" behavior: having five or more drinks on one occasion during the past two weeks. A college president wonders if the proportion of students enrolled at her college who binge drink is actually lower than the national proportion. In a commissioned study, 344 students are selected randomly from a list of all students enrolled at the college. Of these, 132 admit to having engaged in binge drinking.The college president is more interested in testing her belief that the proportion of students at her college who engage in binge drinking is lower than the national proportion of 0.41. What is the P-value? (Round your answer to four decimal places.)P-value = ?
ClairLinx Wireless, a start-up cell phone company, has divided its market of potential customers into three major groups: single, working; married, working; and retired. ClairLinx surveyed 500 potential customers and asked each, "Of the following, which do you consider to be the most important feature in a cell phone service plan: free nights and weekends, free long distance and roaming, or free calls to customers with the same company?" Each of the 500 potential customers in the survey was categorized according to the service plan feature she considers most important and the customer group in which she appears. The data are summarized in the contingency table below. In the cells of the table are the respective observed frequencies, and three of the cells also have blanks. Fill in these blanks with the frequencies expected if the two variables, type of potential customer and choice of service plan feature, are independent. Round the responses to at least two decimal places. Note:…
To better understand how husbands and wives feel about their finances, Mo11ey Magazi11e conducted a national poll of 1010 married adults age 25 and older with household incomes of $50,000 or more (1\!1011ey Magazi11ewebsite, December 14, 2014). Consider the following example set of responses to the question, "Who is better at getting deals?" Who is better Respondent I am My Spouse We are equal Husband 278 127 102 Wife 290 111 102 a. Develop a joint probability table and use it to answer the following questions. b. Construct the marginal probabilities for Who Isbetter (I Am, My Spouse, We Are Equal). c. Given that the respondent is a husband, what is the probability that he feels he is better at getting deals than his wife? d. Given that the respondent is a wife, what is the probability that she feels she is better at getting deals than her husband? e. Given a response "My…
The U.S. Census Bureau conducts annual surveys to obtain information on the percentage of the voting-age population that is registered to vote. Suppose that 679679 employed persons and 690690 unemployed persons are independently and randomly selected, and that 429429 of the employed persons and 369369 of the unemployed persons have registered to vote. Can we conclude that the percentage of employed workers ( p1p1 ), who have registered to vote, exceeds the percentage of unemployed workers ( p2p2 ), who have registered to vote? Use a significance level of α=0.05α=0.05 for the test. Step 1 of 6 : State the null and alternative hypotheses for the test.
The U.S. Census Bureau conducts annual surveys to obtain information on the percentage of the voting-age population that is registered to vote. Suppose that 679679 employed persons and 690690 unemployed persons are independently and randomly selected, and that 429429 of the employed persons and 369369 of the unemployed persons have registered to vote. Can we conclude that the percentage of employed workers ( p1p1 ), who have registered to vote, exceeds the percentage of unemployed workers ( p2p2 ), who have registered to vote? Use a significance level of α=0.05α=0.05 for the test. Step 6 of 6 : Make the decision for the hypothesis test.
The U.S. Census Bureau conducts annual surveys to obtain information on the percentage of the voting-age population that is registered to vote. Suppose that 679679 employed persons and 690690 unemployed persons are independently and randomly selected, and that 429429 of the employed persons and 369369 of the unemployed persons have registered to vote. Can we conclude that the percentage of employed workers ( p1p1 ), who have registered to vote, exceeds the percentage of unemployed workers ( p2p2 ), who have registered to vote? Use a significance level of α=0.05α=0.05 for the test. Step 2 of 6 : Find the values of the two sample proportions, pˆ1p^1 and pˆ2p^2. Round your answers to three decimal places.
The U.S. Census Bureau conducts annual surveys to obtain information on the percentage of the voting-age population that is registered to vote. Suppose that 679679 employed persons and 690690 unemployed persons are independently and randomly selected, and that 429429 of the employed persons and 369369 of the unemployed persons have registered to vote. Can we conclude that the percentage of employed workers ( p1p1 ), who have registered to vote, exceeds the percentage of unemployed workers ( p2p2 ), who have registered to vote? Use a significance level of α=0.05α=0.05 for the test. Step 3 of 6 : Compute the weighted estimate of p, p‾‾p‾. Round your answer to three decimal places.
The U.S. Census Bureau conducts annual surveys to obtain information on the percentage of the voting-age population that is registered to vote. Suppose that 679679 employed persons and 690690 unemployed persons are independently and randomly selected, and that 429429 of the employed persons and 369369 of the unemployed persons have registered to vote. Can we conclude that the percentage of employed workers ( p1p1 ), who have registered to vote, exceeds the percentage of unemployed workers ( p2p2 ), who have registered to vote? Use a significance level of α=0.05α=0.05 for the test. Step 4 of 6 : Compute the value of the test statistic. Round your answer to two decimal places.
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A highway agent sampled cars going from one state to a neighboring state. In his report, he indicated that of the 78 cars sampled, 27 cars were driven by women, 53 cars were sport-utility vehicles, 37 cars had two or more passengers, 24 cars were driven by women in sport-utility vehicles, 21 cars were driven by women and had two or more passengers, 18 cars were sport-utility vehicles and had two or more passengers, and 13 cars were driven by women in sport-utility vehicles and had two or more passengers. After his supervisor reads the report, she explains to the agent that he made a mistake. A. The agent's last four statements indicate that at least _________ cars were driven by women. This contradicts the agent's first statement, which says that only 27 such cars were seen. B. The agent's last four statements indicate that at least ______ cars were sport-utility vehicles. This contradicts the agent's second statement, which says that only 53 such cars were…

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