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Question: The mean and standard deviation of service times for customers at a post office are
known to be 2.93 minutes and 1.79 minutes, respectively.
(a) What is the probability that the average service time for the next two customers is less than 2.7 minutes?
(c) What is the approximate probability that the total service time for the next 65 customers exceeds three hours? (Assume that the next 65 customers represent a simple random sample and that there is always a customer waiting in line.)
Distribution and the method of moments estimators of the parameters are alpha(hat)= 5.23 and lambda(hat) = 21.3. Find an asymptotic 95% confidence interval for alpha.
During a promotion, Christina's department store offers a mailing "scratch a winner - discount savings." after customers select the items they wish to purchase
Let (X1, Y1) and (X2, Y2) be independent and identically distributed continuous bivariate random variables with joint probability density function
Describe how you would select 6 of them to check if they do not have any defects using systematic sampling technique.
statistics application evaluation criteriause this rubric for the following applications factorial anova week 3 anova
In recent years, a number of prominent economists have argued that if a larger share of national output were devoted to investment, the result
new car design specifications are being considered to control the variation of the head injury measurements. use the
a. Verify graphically that normality is an appropriate assumption. b. Calculate a 99% con dence interval for the population difference in mean volumes.
How do you explain the discrepancy between what you have told him and the conclusion reached by Professors Diaconis and Mosteller?
What distinguishes regression from ANOVA? What are the assumptions and limitations of each, and when should one be used in place of the other
Find the probability that at most 5 defective bolts will be found in a box of 200 bolts if it is known that 2 per cent of such bolts are expected to be defective.
What is the probability that 11 or more of these consumers have called an 800 or 900 telephone number for information about some product?
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