Question 428532
 i need to find the z values for a normal distribution 
where the mean is 75 and standard deivation is 21 
- the probability that exceeds 19%
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Find the z with a left tail of 0.19
invNorm(0.19) = -0.8779
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Any z-value greater than -0.8779 will have a left tail
exceeding 19%
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Cheers,
Stan H.