Exhibit 6-6.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. Refer to Exhibit 6-6.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

Exhibit 6-6.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. Refer to Exhibit 6-6.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 Exhibit 6-6.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. Refer to Exhibit 6-6.What proportion of the Jet Skis will last less than seven years?
A)0.2877 
B)0.3707 
C)0.6293 
D)0.7123