IEE 380 Summer 2009
Name: _____________________________
Quiz #10A
The times between two consecutive arrivals to an ATM machine have a pdf that is exponential with a
mean of 5 minutes.
What is the probability that the time between two consecutive arrivals is less than 10
minutes?
You can leave your answer in term form.
T ~ exponential with l = 1/5 min
P(T < 10 min) = F(10) = 1 – e
10/5
= 1 – e
2
Eight viscosity measurements were taken from a process:
724, 718, 776, 760, 745, 759, 742, 740.
Use
your calculator to determine the sample standard deviation.
Report your answer to two decimal places.
19.21
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IEE 380 Summer 2009
Name: _____________________________
Quiz #10B
Eight viscosity measurements were taken from a process:
724, 718, 776, 760, 745, 759, 742, 740.
Use
your calculator to determine the sample standard deviation.
Report your answer to two decimal places.
19.21
The times between two consecutive arrivals to an ATM machine have a pdf that is exponential with a
mean of 5 minutes.
What is the probability that the time between two consecutive arrivals is less than 5
minutes?
You can leave your answer in term form.
This is the end of the preview.
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access the rest of the document.
 Summer '09
 chattin
 Statistics, Standard Deviation, IEE, consecutive arrivals

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