A random sample of voters from three cities is asked to indicate political party affiliation. The results are given in the table.CityPolitical Party AffiliationDemocrat Independent RepublicanMiami 21157132Austin 12684190Detroit 15896146To test whether the proportion of party affiliations for each city is the same, which inference procedure is appropriate to use?O Chi-square goodness-of-fit testO Chi-square test of homogeneity○ Chi-square test of independence○ Two-proportion z-test○ Two-proportion t-test

Given the table with three rows (representing the three cities: Miami, Austin, Detroit) and three…

Answered: A random sample of voters from three…

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 president of a large free-standing laboratory claims that 80 percent of his 5,000 customers are satisfied with the service they receive. To test this claim, a MT research group surveyed 100 customers, using simple random sampling. Among the sampled customers, 73 percent say they are satisfied. Based on these findings, can we reject the president's hypothesis that 80% of the customers are very satisfied? Use a 0.05 level of significance.
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n a recent court case it was found that during a period of 11 years888people were selected for grand jury duty and39%of them were from the same ethnicity. Among the people eligible for grand jury duty,80.4%were of this ethnicity. Use a0.01significance level to test the claim that the selection process is biased against allowing this ethnicity to sit on the grand jury. Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final conclusion that addresses the original claim. Use the P-value method and the normal distribution as an approximation to the binomial distribution.
Assume that the samples are independent and that they hve been randomly selected. A marketing survey involes product recognition in New Yourk and California. Of 682 NEw Yorkers surveryed, 218 knew the product while 192 out of 518 californians knew the product. CAlculate the point estimates for both populations, the pooled sample, and the complement of the pooled sample. At the 0.05 significance level, test the claim that the recpgnition rates are the same in both states. Include your null and alternative hypothesis, the critical vaules, test statistic, P-value, decision about the null hypothesis, and an overall conclusion about the claim in your answer. Draw the z distribution. Construct a 95% confiecne interval estimate of the difference between the two population proportions. Explain how CI supports your decision about the null hypothesis.
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