To determine the proportion of taxpayers who prefer ling tax returns electronically, a survey of 600 taxpayers was conducted. Calculate the margin of error used to estimate this proportion. What assumptions are required to find the margin of error?
Answer to relevant QuestionsA sample of 40 CDs from a student's collection showed a mean length of 52.74 minutes with a standard deviation of 13.21 minutes. Construct a 95 percent confidence interval for the population standard deviation. (Data are ...The historical on-time percentage for Amtrak's Sunset Limited is 10 percent. In July, the train was on time 0 times in 31 runs. At the .10 level of significance, has the on-time percentage fallen? Explain clearly. Use Excel ...Find the z calc test statistic for each hypothesis test. a. x-bar = 242, μ0 = 230, σ = 18, n = 20 b. x-bar = 3.44, μ0 = 3.50, σ = 0.24, n = 40 c. x-bar = 21.02, μ0 = 20.00, σ = 2.52, n = 30 Determine the p-value for each test statistic. a. Right-tailed test, z = 11.34 b. Left-tailed test, z = 22.07 c. Two-tailed test, z = 21.69 Find the critical value of Student's t for each hypothesis test. a. 10 percent level of significance, two-tailed test, n = 21 b. 1 percent level of significance, right-tailed test, n = 9 c. 5 percent level of significance, ...
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