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Suppose we roll a die 10 times. What is the approximate probability that the sum of the numbers obtained lies between 30 and 40?
1 the shape of the distribution of the time required to get an oil change at a 10-minute oil change facility is
Compute the z score corresponding to each of the following values of x. Compute the z score corresponding to each of the following values of x
a trucking firm suspects that the variance for a certain tire is greater than 1000000. to check the claim the firm
Make a decision by computing the test statistic and comparing it to the decision rule spelling out in English just what the decision means in terms of the question in the problem.
a telephone company claims that 90 percent of the time when customers call for directory assistance the customer is
A local health center noted that in a sample of 400 patients 80 were referred to them by the local hospital. a) Provide a 95% confidence level for all the patients who are referred to the health center by the hospital.
an average of 5 calls coming per minute. What is the probability that up to a minute will elapse until 2 calls have come in to the switchboard?
messages arrive at a switching center in accordance with a poisson process having mean arrival rate of 180
Compute a seasonalized or adjusted sales forecast.
Give an example of a situation in which you believe a Type I Error is more serious. Give an example of a situation in which you believe a Type II Error is more serious. In each case, why do you think so?
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).
Construct a 99% confidence interval for the average length of usage time to recharge.
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