A company wants to estimate the proportion of smokers on staff to within 5%, with 99% confidence. A preliminary estimate of the proportion of smokers is 0.1867. How big a sample size is necessary?
Answer to relevant QuestionsA company wants to estimate the proportion of employees who have children of daycare age to within 5%, with 95% confidence. No estimate is available. How big a sample size is necessary? How big a sample size would be ...Return to the confidence interval you constructed for Develop Your Skills 8.1, Exercise 1. The company nurse claims that the percentage of smokers on staff is 20%. Does the sample evidence support the nurse's claim? What ...A random sample of monthly daycare costs for 50 households in Halifax, Nova Scotia, yields an average of $460, with a standard deviation of $65. Estimate the average monthly daycare costs for all Halifax households, with 98% ...An ice cream store wants to expand its range of flavours, and has decided to do some research to select which flavours to add. Customers were presented with a range of new flavours, and asked which one they would like to ...A random sample of 212 Canadian Internet users reveals that they visited an average of 1,576 web pages per month. a. Assume the standard deviation from the sample was 521. Construct a 95% confidence interval estimate of the ...
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