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Maru [420]
3 years ago
15

NEED HELP

Mathematics
1 answer:
Sladkaya [172]3 years ago
5 0

Answer:

2.60

Step-by-step explanation:

z-score is the difference between the score and mean, divided by the standard deviation.

z = \frac{x - \mu}{\sigma}

z = \frac{91-77.5}{5.2} = \frac{13.5}{5.2} \approx 2.596

So 2.6 is an answer close enough.

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