Exhibit 3-3
Suppose annual salaries for sales associates from a particular store have a bell-shaped distribution with a mean of $32,500 and a standard deviation of $2,500.
-Refer to Exhibit 3-3. The z-score for a sales associate from this store who earns $28,000 is
A)28
B)1.8
C)-1.8
D)0.78

Question

Quizplus · Accepted Answer

To find the z-score, we use the formula z = (x - μ) / σ where x is the value we are trying to find the z-score for (in this case, $28,000), μ is the mean ($32,500), and σ is the standard deviation ($2,500). Plugging in the values, we get z = (28,000 - 32,500) / 2,500 = -1.8. Therefore, the answer is C.

Exhibit 3-3 Suppose Annual Salaries for Sales Associates from a Particular Store