NT=Observed time per unit x Performance rating
ST=NT(1+Allowances) or { NT/(1-Allowances) if he works in a period eg 8 hours.}
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The mean must be 0 and the standard deviation must be 1. Use the formula: z = (x - mu)/sigma
s= bracket n over sigma i (xi-x-)^2 all over n-1 closed bracket ^ 1/2
The standard normal distribution is a special case of the normal distribution. The standard normal has mean 0 and variance 1.
The area under the standard normal curve is 1.
0.368 or 36.8%.And you should specify that it is a standard normal distribution.0.368 or 36.8%.And you should specify that it is a standard normal distribution.0.368 or 36.8%.And you should specify that it is a standard normal distribution.0.368 or 36.8%.And you should specify that it is a standard normal distribution.