It is well documented that a typical washing machine can last anywhere between 5 to 12 years.
Question:
Y = eX where X is normally distributed. In addition, let the mean and standard deviation of the life of a washing machine be 8 years and 4 years, respectively.
a. Compute the mean and the standard deviation of X. b. What proportion of the washing machines will last for more than 10 years?
c. What proportion of the washing machines will last for less than 6 years?
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Related Book For
Business Statistics Communicating With Numbers
ISBN: 9780078020551
2nd Edition
Authors: Sanjiv Jaggia, Alison Kelly
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