Question 581518
Tonya's z-score is


*[tex \LARGE z_t = \frac{1770-1509}{321} \approx 0.81]


Jermaine's z-score is


*[tex \LARGE z_j = \frac{28-21.5}{5.4} \approx 1.20]


Jermaine has the higher z-score, and scores "higher."