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Suppose that the telephone calls coming into a certain switchboard obey a Poisson probability law at a rate of 16 calls per minute. If the switchboard can handle at most 24 calls per minute, what is the probability, using a normal approximation, that in 1 minute the switchboard will receive more calls than it can handle (assume all lines are clear).
Find the standardized statistic for x‾ = 97.- Find the standardized statistic for x‾ = 105.- Give numerical values for the mean and standard deviation of the sampling distribution of x‾.
Explain how two variables can have a perfect curved relationship yet have zero correlation. Draw a picture of a set of data meeting those criteria.
What is the optimal number of hours 10 wait before you return for inspection in order to minimize your expected cost?
Indicatethe method ofconstructing histogram, frequency polygon and ogive. Define Frequency polygon and Frequency Curve. Explain clearly the relation that exists n them.
A recent report in Business Week indicated that 20 percent of all employees steal from their company each year. If a company employs 50 people, what is the probability that: Fewer than 5 employees steal?
A random sample of the percentage used space for companies is 38, 18, 91, 37, 55, 80, 71, 92, 68, 78, 40, 36, 50, 45, 22, 19, 62, 70, 82, 25. Conduct the test using α = 0.05.
The pie chart below shows the distribution of the citizens' answers. If there are citizens in the community, how many chose Birds, Hamsters, or Dogs?
(Distribution of Maximum). Suppose n numbers are drawn at random from f1; 2; ··· ;N g. What is the probability that the largest number drawn is a specified number k if sampling is (a) with replacement; (b) without replacement?
In a recent year grade 8 Washington State public school students taking a mathematics assessment test had a mean score of 276.1 with a standard deviation of 34.4. Possible test scores could range from 0 to 500. Assume that the scores are normally dis..
When a production machine is properly calibrated, it requires an average of 25 seconds per unit produced, with a standard deviation of 3 seconds. For a simple random sample of n 5 36 units, the sample mean is found to be }x 5 26.2 seconds per unit..
Specify the competing hypotheses to test whether there are some differences in the average whitening effectiveness of the three detergents.
What is a 95% confidence interval for µM - µF? Obtain boxplots of the two sets of pulse rates. Do they look as though they come from normal populations?
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