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 less than seven years?
A) 0.2877
B) 0.3707
C) 0.6293
D) 0.7123

Question

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 less than seven years?
A) 0.2877 
B) 0.3707 
C) 0.6293 
D) 0.7123

Quizplus · Accepted Answer

The Answer of 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 less than seven years?
A) 0.2877 
B) 0.3707 
C) 0.6293 
D) 0.7123

Let the Lifetime of a New Jet Ski Be Represented