A random sample of 100 persons was selected from each of four regions in the United States. These people were asked whether or not they support a certain farm subsidy program. The results of the survey are summarized in the following table.
Using a 1% significance level, test the null hypothesis that the percentages of people with different opinions are similar for all four regions.
Answer to relevant QuestionsConstruct the 98% confidence intervals for the population variance and standard deviation for the following data, assuming that the respective populations are (approximately) normally distributed. a. n = 21, s2 = 9.2 b. n = ...Refer to Exercise 11.63b. Test at a 5% significance level if the population variance is different from 10.4. n = 18, s2 = 14.8 The following are the prices (in dollars) of the same brand of camcorder found at eight stores in Los Angeles. a. Using the formula from Chapter 3, find the sample variance, s2, for these data. b. Make the 95% confidence ...Refer to Problem 11.61. Explain why the hypothesis test in that problem is a test of homogeneity as opposed to a test of independence. What feature of the data would change if you were to collect data in order to test for ...A consumer agency wanted to find out if the mean time taken by each of three brands of medicines to provide relief from a headache is the same. The first drug was administered to six randomly selected patients, the second to ...
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