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sigma(std dev) | 3 | |
mu(mean) | 25 | |
z value for 4 | 0.166667 | (x-mu)/(sigma) |
z value for 8 | 0.666667 | (x-mu)/(sigma) |
P(z<0.167) | 0.630559 | Use normdist functin in excel |
P(z<0.667) | 0.908789 | Use normdist functin in excel |
P(26<x<29) | 0.27823 |
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