The Dow Jones Industrial Average has had a mean gain of 432 pear year with a standard deviation of 722. A random sample of 40 years is selected. What is the probability that the mean gain for the sample was between 200 and 500? Looking for a Similar Assignment? Order now and Get 10% […]
Of all the companies on the New York Stock Exchange, profits are normally distributed with a mean of $6.54 million and a standard deviation of $10.45 million. In a random sample of 73 companies from the NYSE, what is the probability that the mean profit for the sample was between -2.9 million and 4.5 million? […]
Hospital waiting room times are normally distributed with a mean of 38.12 minutes and a standard deviation of 8.63 minutes. What is the shortest wait time that would still be in the worst 20% of wait times? Looking for a Similar Assignment? Order now and Get 10% Discount! Use Coupon Code “Newclient”
Question 1From a random sample of 58 businesses, it is found that the mean time the owner spends on administrative issues each week is 21.69 with a standard deviation of 3.54. What is the 95% confidence interval for the amount of time spent on administrative issues? A)(19.24, 24.14) B)(20.71, 22.67) C)(20.93, 22.46) D)(21.78, 22.60) Question […]
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