Lisa's score on the Stats midterm was 90 points. The class average was 76 and the standard deviation was 77 points. What was he r z-score?
1 answer:
Answer:
as posted: 0.18182
more likely: 2.00
Step-by-step explanation:
z = (x -μ)/σ
... = (90 -76)/77 = 14/77 = 2/11
z ≈ 0.18182
_____
We know that cutting and pasting often results in numbers being unintentionally repeated, so your 77 may be intended to be 7. In that case, the z-score is
... z = (90 -76)/7 = 14/7
z = 2
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