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?
Z-scores are found using the formula [tex]z=(x-\mu) \div\sigma[/tex], where x is your data point you're using, μ is the mean, and σ is the standard deviation. Using our information we then have [tex]z=(6-8)\div 3.2=(-2)\div 3.2=-0.625[/tex]
