Answer to Question #255024 in Statistics and Probability for Lyka

Question #255024

The life expectancy of a particular car battery is 24 months with a standard deviation of 2 months. What is the z- score if a particular car battery lasted for only 20 months?

Expert's answer

"z=\\frac{\\mu-x}{\\sigma}"

"z=\\frac{20-24}{2}"

z = -2

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