A researcher wanted to know whether the inhabitant of a town are interested to pay income tax. There are 10,000people in the town. A random sample of 3,500 people are selected, but 2,500 people provided responses. Supposethe fixed response model applies and the sample data is summarized in the following Table.Interested to pay taxResponseYesNoYes2,000500No600400Compute the percentage of people interested in paying tax.Compute the value of the contrast K.Compute the bias of the estimator ( B(ỹ)).If the relative bias B(y)/S(y,)= 1.25, find the confidence level P(Y eIR) of the 95%confidence interval for the mean of the response group. Interpret the results.d)

Given information: Response Interested to pay tax Yes No Yes 2000 5000 No 600 400 Sum…

Answered: A Tescarcher wanted to know whether 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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Suppose a random sample of 1389 Californians who own their own homes were surveyed. The table below shows the results of the survey Observed Frequencies of Political Affiliation from the Sample Outcome Observed Frequency Democrat Republican Independent/Other 361 597 431 The second column of the table below shows the distribution of political affiliation for the entire population of California voters. Fill in the expected frequencies. Round to two decimal places, if necessary. Frequencies of Political Affiliation Expected Percent Outcome Expected Frequency Democrat 40 Republican 32 Independent/Other 28
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In a city, according to a 1990 demographic report based on the census result, the average daily spending onfood per person is $75.In 2020, a random sample of 28 persons in the same city is selected and the daily spending ($) on food foreach interviewee is recorded as follow:55.0 59.5 62.5 65.5 68.5 69.0 70.0 70.0 82.0 82.583.5 85.0 86.0 86.5 86.5 87.0 87.0 87.0 89.0 92.593.0 94.5 94.5 96.0 98.0 102.5 108.5 110.5(a) Find the point estimate for the population mean daily spending on food per person in year 2020.(b) It is assumed that the spending is normally distributed. Construct a 90% confidence interval estimatefor the population mean daily spending on food per person in year 2020.(c) Is there sufficient evidence to conclude that the population mean daily spending on food per person in2020 is higher than 1990? Test at 1% level of significance. (State clearly the null hypothesis,alternatively hypothesis, rejection region, test statistics and conclusion.)
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