The student government association at a university wants to estimate the percentage of the student body that supports a change being considered in the academic calendar of the university for the next academic year. How many students should be surveyed if a 90% confidence interval is desired and the margin of error is to be only 3%?
Answer to relevant QuestionsDetermine the sample size needed for each of the following situations. a. N = 1,650 σ = 500 1.96σx-bar = 50 b. N = 1,650 σ = 500 1.96σx-bar = 100 c. N = 1,650 σ = 500 1.96σx-bar = 200 d. Compare and comment on your ...A country club wants to poll a random sample of its 320 members to estimate the proportion likely to attend an early-season function. The number of sample observations should be sufficiently large to ensure that a 99% ...The manager of a local fitness center wants an estimate of the number of times members use the weight room per month. From a random sample of 25 members the average number of visits to the weight room over the course of a ...Find the reliability factor, zα/2, to estimate the mean, m, of a normally distributed population with known population variance for the following. a. α = 0.08 b. α/2 = 0.02 Several drugs are used to treat high blood pressure. A sales specialist for a leading pharmaceutical company randomly sampled the records of 10 sales districts to estimate the number of new prescriptions that had been ...
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