Gina and Stewart Are Surf-Fishing on the Atlantic Coast, Where

Multiple Choice

Gina and Stewart are surf-fishing on the Atlantic coast, where both bluefish and pompano are common catches. The mean length of a bluefish is 288 millimeters with a standard deviation of 51 mm. For pompano, the mean is 129 mm with a standard
deviation of 40 mm. Stewart caught a bluefish that was 321 mm long. What was the z-score for this length?

A) 0.65
B) 321
C) 6.29
D) 4.8