King Fahd University of Petroleum & Minerals
Mathematical Sciences
Stat319-Term033
Quiz #3 Sections: 3
& 4
Name:
ID: Serial:
Question one: (5 points)
The time that each plane waits for service at an aircraft repair facility may be assumed to exponentially distributed. A sample of size 50 aircraft waiting times will be collected. Assuming that planes are removed from the holing area at a mean rate of 2 per day, determine the probability that the sample mean time is between 0.4 and 0.6
Solution:
Question two: (5 points)
A
sample of 200 parts is to be tested from a shipment containing 1000 items.
Assume that the proportion of defective items is 0.03. Determine the probability that for the sample
proportion defective
Solution: