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Customers at a bank wait in a single line for the next available teller. Customer arrivals can be modeled by a Poisson distribution that has a mean of 70 per hour during the midmorning hours. A teller can process an average of 100 customers per hour, which also can be modeled by a Poisson distribution. If there is one teller on duty, determine:
a. The average time a customer must wait in line for the letter.
b. The average number of customers waiting in line.
c. Average service time.
d. System utilization.
e. The probability of no customers waiting in line.
What values would be appropriate for the performance measures listed in the preceding problem for the case in which two tellers are available?
Public transportation and the automobile are two methods an employee can use to get to work each day. Samples of times recorded for each method are shown. Times are in minutes.
What is the probability that a cereal would either high calorie or high fiber? In other words, what is P(high calorie or high fiber)?
Using a level of significance of .10, is there evidence that the population mean weight of the candy bars is greater than 7.3? Fully explain your answer.
Assume that female students' heights are normally distributed with a mean given by µ = 67.2 in. and a standard deviation given by σ = 3.6 in.
Suppose that the average annual salary for a worker in the United States is $30,000 and that annual salaries for Americans are normally distributed with a standard deviation equal to $7,000. Determine the following:
Ms. Tina Stevens just purchased a new dress that cost $120. What is the probability she paid cash or check? (Round your answer to 3 decimal places.)
The Acme Candy Company claims that 8% of the jawbreakers it produces actually result in a broken jaw. Suppose 9571 Persons are selected at random from those who have eaten a jawbreaker produced at at Acme Candy Company. Would it be unusual for thi..
Many newspapers carry a certain puzzle in which the individual must unscramble letters to form words. How many ways can the letters of YARNLE be arranged?
A locksmith is preparing an electronic key code of 3 integers selected from the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} without replacement. Calculate the probability that at least one of integer in the code is 5.
A point estimate for the difference between the mean purchases of the users of the two credit cards is:
Run a multiple regression and interpret all the findings, R 2 , F, IV coefficients, and the intercept. Then in paragraph format, identify and report the following:
Find the probability of a Type II error if in fact the mean waiting time is actually 9.8 minutes.
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