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Let the Lifetime of a New Jet Ski Be Represented

Question 29

Multiple Choice

Let the lifetime of a new Jet Ski be represented by a lognormal variable, Let the lifetime of a new Jet Ski be represented by a lognormal variable, where X is normally distributed.Let the mean of the lifetime of the Jet Ski be six years with a standard deviation of three years. What proportion of the Jet Skis will last nine or more years? A) 0.1379 B) 0.1587 C) 0.8413 D) 0.8621 where X is normally distributed.Let the mean of the lifetime of the Jet Ski be six years with a standard deviation of three years. What proportion of the Jet Skis will last nine or more years?


A) 0.1379
B) 0.1587
C) 0.8413
D) 0.8621

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