Confidence interval of the true proportion
It was found that in a sample of 80 teenage boys, 70% had gotten speeding tickets. Determine the 90% confidence interval of the true proportion, p, of teenage boys who have gotten speeding tickets?
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What should be minimum value of land in 10 years to make purchase worthwhile-regardless of whether Renco actually uses site for the plant expansion?
A random sample of 40 rolls of 5/16 inch diameter aircraft cable was taken from current production of the Calamity Cable Company. A piece was selected from each roll and fastened into a mechanical stretcher which could read the force which broke t
The average weight of 60 randomly selected compact automobiles was 2620 pounds. The sample standard deviation was 430 pounds. What is the 95% confidence interval of a true mean weight, m, in pounds, of the automobiles?
Find amount, if any, of expense must be reflected in Post's quarterly income statement for 3 months ended March 31, 2015?
Cost of goods sold for 2015 was $3,600,000 and ending inventory at December 31, 2015, was $400,000. Determine inventory turnover for 2015?
A company produces the latest model of camera in large quantity. From past record, the defective rate is known to be 5%. Everyday, the company will sample a batch of 20 cameras to check for manufacturing error. Assuming that the number of defectiv
Let x be a random variable representing dividend yield of Australian bank stocks. We may assume that x has a normal distribution with = 2.3%. A random sample of 18 Australian bank stocks has a sample mean of = 6.1%.
In analyzing hits by V-1 buzz bombs in World War II, South London was subdivided into 576 regions, each with an area of 0.25km. A total of 535 bombs hit the combined area of 576 regions. If a region is randomly selected, find the probability that
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