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10 questions from this quiz
Boundary for a given probability
Area to the left of a boundary
0.580.580.58
Number of standard deviations from mean
z=X−μσz = \frac{X - \mu}{\sigma}z=σX−μ
−1.423-1.423−1.423
The distribution is symmetrical about mean
Subtract 10th percentile from 90th
All boundaries are 2 SD from mean
Solve algebraic and numerical z equations
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