The number of errors per 1000 words made by a particular typist has a Poisson distribution with a mean of 2.5. (a) Find the probability that, in a 4000 word script, there should at least be 14 typing errors. (b) Using a suitable approximation, show that the probability will be more than 25 errors in a 10000 word dissertation.
The number of errors per 1000 words made by a particular typist has a Poisson distribution with a mean of 2.5. (a) Find the probability that, in a 4000 word script, there should at least be 14 typing errors. (b) Using a suitable approximation, show that the probability will be more than 25 errors in a 10000 word dissertation.
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
Problem 10E
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The number of errors per 1000 words made by a particular typist has a Poisson distribution with a
(a) Find the
(b) Using a suitable approximation, show that the probability will be more than 25 errors in a 10000 word dissertation.
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