Download and Install Open Office (See Resources). Launch Open Office and select the Spreadsheet program. This will take you to a blank spreadsheet.
Go to Cell A1 and type "Mean". On cell A2 type "Standard Deviation". Go to cell B1, and type the value zero (0). Go to cell B2 and type the number one (1).
The Standard Distribution has a mean equal to zero, and a standard deviation equal to 1.
Go to cell C1 and type "Probability". Starting at column C2, type the probability as numbers between zero (0%) and one (100%). If you want to calculate more than one inverse standard distribution, you will need a different probability for each calculation. Type all your probabilities (if you have more than one), on column C.
Remember, the inverse standard cumulative takes probability as an input, and probability is always a number between zero and one, but never equal to zero or one.
Go to column D1 and type " Inverse Standard Normal Cumulative Distribution". Enter the formula for the inverse normal distribution on cell D2. The inputs on the formula are the probability value, the mean and the standard deviation.
The formula is: "=NORMINV(C2, $A$2, $B$2)".
If you need to calculate more than one inverse, copy and paste the formula from cell D2 into the cells of column D as needed.
Go to cell D1, and type "Inverse Standard Normal Cumulative Distribution ". Column D will have the values of the inverse function.