Estimate for the true population proportion
A decision maker is interested in estimating a population proportion. A sample of size n = 150 yields 115 successes. Based on these sample data, construct a 90% confidence interval estimate for the true population proportion.
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Airline managers expect that only about 15% will say "yes." Based on this assumption, what size sample should the airline take if it wants to develop a 95% confidence interval estimate for the population proportion who will say "yes" with a margin
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Consider the continuous triangular distribution y=x/4.5, where 0<x<3. a) What is the probability of 0<x<3? b) what is the probability of x=2? C) What is the probabbility 0<x<1? D) What is the probability of 1<x<2?
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The breaking strength of Flimsy safety belts is known to be approximately normally distributed with a population mean of 8000 pounds and a population standard deviation of 250 pounds. If a simple random sample of 25 belts is chosen, what is the pr
A simple random sample of 240 people was asked if they have insurance coverage, and 66 replied that they did not have coverage. Based on these sample data, determine the 95% confidence interval estimate for the population proportion.
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