Converts a confidence level (%) to a standard deviation range.
CNF2STD(alpha)
alpha |
- |
A real or series. The confidence level(s) in %. Defaults to, 99, a 99% confidence level. |
A real or series. The standard deviation range for the given confidence level.
cnf2std(99)
returns 2.5758, the standard deviation range for a confidence level of 99%.
W1: {99, 98, 97, 96, 95}
W2: cnf2std(w1)
W2 == {2.5758, 2.3263, 2.1701, 2.0537, 1.9600}
the standard deviation ranges for confidence levels 99%, 98%, 97%, 96%, and 95%.
CNF2STD uses the built-in INVPROBN function to lookup a z value for a given probability.