# CONFIDENCE.NORM Function

The CONFIDENCE.NORM function is one of the statistical functions. It is used to return the confidence interval for a population mean, using a normal distribution.

The CONFIDENCE.NORM function syntax is:

CONFIDENCE.NORM(alpha, standard-dev, size)

where

alpha is the significance level used to compute the confidence level, a numeric value greater than 0 but less than 1.

standard-dev is the population standard deviation, a numeric value greater than 0.

size is the sample size, a numeric value greater than or equal to 1.

The numeric values can be entered manually or included into the cells you make reference to.

To apply the CONFIDENCE.NORM function,

1. select the cell where you wish to display the result,
2. click the Insert Function icon situated at the top toolbar,
   or right-click within a selected cell and select the Insert Function option from the menu,
   or click the icon situated at the formula bar,
3. select the Statistical function group from the list,
4. click the CONFIDENCE.NORM function,
5. enter the required arguments separating them by commas,
6. press the Enter button.

The result will be displayed in the selected cell.