During a bear market, 140 investors were asked how they were adjusting their portfolios to protect themselves. Some of these investors were keeping most of their money in stocks, whereas others were shifting large amounts of money to bonds, real estate, or cash (such as money market accounts). The results of the survey are shown in the following table.
Using a 2.5% significance level, test the null hypothesis that the percentages of investors favoring the four choices are all equal.
Answer to relevant QuestionsA randomly selected sample of 100 persons who suffer from allergies were asked during what season they suffer the most. The results of the survey are recorded in the following table. Using a 1% significance level, test the ...Find the value of x2 for 4 degrees of freedom and a. .005 area in the right tail of the chi-square distribution curve b. .05 area in the left tail of the chi-square distribution curve Refer to Exercise 11.63a. Test at a 1% significance level if the population variance is greater than 4.2. n = 10, s2 = 7.2 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 ...You are performing a goodness-of-fit test with four categories, all of which are supposed to be equally likely. You have a total of 100 observations. The observed frequencies are 21, 26, 31, and 22, respectively, for the ...
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