Advances in technology are dramatically affecting different aspects of our lives. For example, the number of daily newspapers is decreasing because of easy access to Internet and television news. To help address such issues, we want to estimate the percentage of adults in the United States who use a computer at least once each day. Find the sample size needed to estimate that percentage. Assume that we want 90% confidence that the sample percentage is within two percentage points of the true population percentage.
Answer to relevant QuestionsWhat is the difference between statistical significance and practical significance? Can a statistical study have statistical significance, but not practical significance? Repeat Exercise 5 assuming that the size of each batch is 100 instead of 10,000. Compare the control chart to the one found for Exercise 5. Comment on the general quality of the manufacturing process described in Exercise 5 ...After finding the values of the mean and range for each year, find the values of x, and R. Then find the values of LCL and UCL for an R chart and find the values of LCL and UCL for an x chart. Refer to the amounts of energy ...Test Refer to the same sample data given in the preceding exercise. Assume that the experiment was conducted to determine whether the new method of using kiln-dried seed is better. Conduct an appropriate hypothesis test. After finding the sample mean and sample range for each of the 25 days, find the values of x and R. Also find the values of LCL and UCL for an R chart, then find the values of LCL and UCL for an x chart.
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