The owner of a car wash wants to see if the arrival rate of cars follows a Poisson distribution. In order to test the assumption of a Poisson distribution, a random sample of 150 ten-minute intervals was taken. You are given the following observed frequencies:
Number of Cars Arrivingin a 10-Minute Interval
Frequency
0
3
1
10
2
15
3
23
4
30
5
24
6
20
7
13
8
8
9 or more
4
150
?
Calculate mean and use Poisson probabilities. The expected frequency of exactly 3 cars arriving in a 10-minute interval is
A. .1533.
B. .1743.
C. 23.
D. 26.145.
Answer: D
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A. racketeering. B. guilty of conspiracy to defraud. C. operating an insider-trading operation. D. operating a Ponzi scheme.
An analyst examines changes in a firm's various ratios over a three-year period—a so-called _____ analysis and performs a _____ analysis comparing a given firm's ratios with those of other firms for a specific period
a. cross-section; time-series b. time-series; cross-section c. profitability; time-series d. time-series; profitability e. none of the above
Financial resources for government and charity nonprofit organizations come from all of the following EXCEPT ______.
A. appropriations B. taxes C. sales of goods D. grants E. donations
_____ forecasts are needed for planning production schedules and to assign workers to jobs
a. Long-range b. Intermediate-range c. Short-range d. Demand planning