Question

fast-food expenditures the average person, according to one source, spends $188 per year on fast - foods. if the standard deviation is $12, find the corresponding z score for each raw score. round z scores to at least two decimal places.
part: 0 / 3
part 1 of 3
the z score corresponding to $168 is

Explanation:

Step1: Recall the z - score formula

The formula for the z - score is $z=\frac{x-\mu}{\sigma}$, where $x$ is the raw score, $\mu$ is the mean, and $\sigma$ is the standard deviation.

Step2: Identify the values

Given that $\mu = 188$, $\sigma=12$, and $x = 168$.

Step3: Substitute the values into the formula

$z=\frac{168 - 188}{12}=\frac{-20}{12}\approx - 1.67$

Answer:

$-1.67$