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Suppose the service time, in minutes, at a bank has the Exponential distribution with lambda = 1/2. Use the central limit theorem to estimate the probability that the average service time of the first n customers is less than 2.5 minutes, when: a.) n = 16 b.) n = 36 c.) n = 100
the personnel department of a large corporation wants to estimate the family dental expenses of its employees to
The average age in the sample was 22.5 years with a standard deviation of 5 years. Construct a 95% confidence interval for the true average age of the consumers.
Suppose that the probability of strong demand is 0.8 and the probability of weak demand is 0.2. What is the optimal decision using the expected value approach?
The heights of 20- to 29-year-old females are known to have a population standard deviation 1) = 2.7 inches. A simple random sample of n = 15 females 20 to 29 years old results in the following data
determine whether the hypothesis test involves a sampling distribution of means that is a normal distribution student t
Among the half that had surgery, 80% showed improvement after three months, but only 54% of those who used the wrist splints improved. what's the standard error of the difference in the two proportions?
Evaluate each expression-Diameter of a circle. If the diameter of a circle is 1.3 * 10^-12 meters, then what is the radius?
Calculate a 3-period moving average for period 7. Compute the MAD of the forecast.
assume that matched pairs of data result in the given number of signs when the value of the second variable is
Find the probability that the mean weight of those loads is less than 42.00 tons. Assume that the variable is normally distributed.
Use relative frequencies to estimate the probability that a seed will not germinate. What is your estimate? Use relative frequencies to estimate the probability that a seed will not germinate.
suppose three fair dice are rolled at the same time.a what is the probability that at least one number will be less
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