A company manufactures eyeglasses for different retailers. In March 2010, they tested to see how many defective lenses they made, and there were 17.5% defective lenses due to scratches. Suppose the compa examined twenty-one eyeglasses.
A company manufactures eyeglasses for different retailers. In March 2010, they tested to see how many defective lenses they made, and there were 17.5% defective lenses due to scratches. Suppose the compa examined twenty-one eyeglasses.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A company manufactures eyeglasses for different retailers. In March 2010, they tested to see how many
defective lenses they made, and there were 17.5% defective lenses due to scratches. Suppose the compa
examined twenty-one eyeglasses.
State the random variable.
The number of lenses that were scratched.
O The type of defect.
The number of defective lenses.
Round your answers to four decimal places, if necessary.
Find the probability that
None are scratched.
P(x = 0) =
All are scratched.
P(x = 21) =
At most eleven are scratched.
P(x < 13) =
At least thirteen are scratched.
P(x > 5) =
Is it unusual for at least thirteen lenses to be scratched?
No, because the probability is less than 0.05.
Yes, because the probability is at least 0.05.
O No, because the probability is
least 0.05.
Yes, because the probability is less than 0.05.
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