Suppose we conduct a poll to estimate the proportion of voters who favor a major presidential candidate. Assuming that 50 percent of the electorate could be in favor of the candidate, determine the sample size needed so that we are 95 percent confident that p̂, the sample proportion of voters who favor the candidate, is within a margin of error of .01 of p, the proportion of all voters who are in favor of the candidate.
Answer to relevant QuestionsExplain why the finite population correction√(N – n) / N is unnecessary when the sample size is less than 5 percent of the population size. Give an example using numbers. National Motors has equipped the ZX-900 with a new disk brake system. We define the stopping distance for a ZX-900 to be the distance (in feet) required to bring the automobile to a complete stop from a speed of 35 mph under ...The mean of the sample of 65 customer satisfaction ratings in Table 1.7 is 42.95. If we let m denote the mean of all possible customer satisfaction ratings for the XYZ Box video game system, and assume that the population ...Do part b of Exercise 9.15 if the sample mean equals 60.262. In par b exercise Suppose that Consolidated Power decides to use a level of significance of a .05, and suppose a random sample of 100 temperature readings is ...Consider the e- billing case. The mean and the standard deviation of the sample of 65 payment times are 18.1077 and 3.9612, respectively. (1) Test H0: μ < 19.5 versus Ha: μ < 19.5 by setting a equal to .01 and using a ...
Post your question