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Description: Returns the normal failure rate at a given time.
Syntax: normfr(x, Mean, Standard_dev)
x is the time at which the function is evaluated.
Mean is the mean of the distribution.
Standard_dev is the standard deviation the distribution.
Remarks:
x and Standard_dev must be numerical and > 0.
Mean must be numerical.
All parameter values can include:
Numerical values
Standard operands (+, -, *, /)
Predefined mathematical functions (exp, log, sin, etc.)
References to any analysis workbooks
Example:
mormfr(42, 40, 1.5)
Returns:
1.19857
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