Let the Lifetime of a New Jet Ski Be Represented

question 94

Multiple Choice

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

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Definitions:

African-Americans

An ethnic group in the United States with partial or total ancestry from any of the Black racial groups of Africa, notable for their distinct cultural, historical, and social experiences.

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Low-cost, mass-produced developments of suburban tract housing built by William Levitt after World War II on Long Island and elsewhere.

Four Freedoms

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The 32nd President of the United States (1933-1945), known for leading the country during the Great Depression and World War II.