Soal SMA · Soal cerita · Kesulitan 4/5

A student's score on a test is 85. The test scores are normally distributed with a mean of 70 and a standard deviation of 10. What is the student's z-score?

A.1.0
B.1.5
C.2.0
D.2.5

Kunci jawaban & pembahasan

Jawaban: 1.5

z = (85-70)/10 = 15/10 = 1.5. Thus, option B is correct.

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