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Joes Trucking provides shipping service from the outlying areas of New York City to a known distribution point within Manhattan. To understand the number of trucks required for a given service level agreement defined by a guaranteed delivery interval, the operations manager conducts a study of drive times. The manager would like to obtain an accuracy of 10 min, plus or minus 5 minutes. Randomly sampling the drive times over a 30-day period, including weekends and all times of day, produces 300 data points. A 95 percent confidence interval is required to ensure customer satisfaction. The mean is found to be 3.01 hours, with a standard deviation of 0.64. Is the sample size adequate for the accuracy requirements? If yes, determine the confidence interval for the mean delivery time.
the line up contained 5 men. if the identifications were made by ramdom guesses, find the probability thatall witnesses would pick the same person.
Consider a random sample of size n from a normal distribution, Xi ~ N(m,9). a) Find the CRLB for the variances of unbiased estimators of m. b) Is the MLE, m(hat) = X(bar), a UMVUE of m?
If I have a set of values(direct measurements of dynamic deformations of a road at 100m) between 3 and~1000, how can I calculate the 2 characteristical values wich limits the interval including 85,95% of all possible measurements on this road? Using ..
A big multinational corporation based in Toronto recently moved it's production facilities to Mexico. When the corporation was in Toronto, it had an older, experienced labour force with a mean age of 45 years.
The U.S. Bureau of Prisons publishes data in Statistics Report on the times served by prisoners released from federal institutions for the first time.
For machine gun ammunition to be acceptable, the US Army requires that 96 percent of rounds fired hit a specified target. The test is to fire a 50 round burst at the target and observe whether this condition is met.
M&M Confidence Interval regarding the count of each color of M&M contained in a "fun size" bag of M&Ms for hypothesis testing. Use the traditional hypothesis testing method,
You are a business executive sponsoring an IT project that will develop a custom-built business application to take product orders over the Internet. You need to get this solution to market fast (in a few months).
A company produces calculators in batches of 64. Four out of every 100 calculators are defective. State the random variable for this situation and list its values.
Using a 2-month weighted moving average, with weights of 2 for the most recent month and 1 for the previous month develop forecasts sales for March to June inclusive.
Test the manager's claim at 5% and 1% significance level tests.
Suppose that a certain college class contains 45 students. Of these, 26 are sophomores, 25 are chemistry majors, and 7 are neither. A student is selected at random from the class.
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