Suppose the ages of cars driven by employees at a company are normally distributed with a mean of 8 years and a standard deviation of 3.2 ye

Question

Suppose the ages of cars driven by employees at a company are normally distributed with a mean of 8 years and a standard deviation of 3.2 years. What is the z score of a car that is 6 years old?

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    0
    2021-09-11T09:31:26+00:00

    Answer:

    z=(6-8)/3.2=(-2)/3.2=-0.625

    Step-by-step explanation:

    z=(6-8)/3.2=(-2)/3.2=-0.625

    0
    2021-09-11T09:32:20+00:00

    Z-scores are given by the formula z=(x-\mu)\div\sigma, where x is the data point you’re using, μ is the mean and σ is the standard deviation.  Using our information we have 
    z=(6-8)÷3.2=(-2)÷3.2=-0.625.

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