## How to use the CONFIDENCE function

The CONFIDENCE function calculates the confidence interval for a population mean, using a normal distribution.

Formula in cell B6:

=CONFIDENCE(B3, C3, D3)

### Excel Function Syntax

CONFIDENCE(*alpha*, *standard_dev*, *size*)

### Arguments

alpha |
Required. The significance level used to calculate the confidence level. 0.05 represents a 95% confidence level. |

standard_dev |
Required. The standard deviation for the data points. |

size |
Required. The number of data points. |

### Comments

The CONFIDENCE function returns an #VALUE! error if an argument is not a number.

The CONFIDENCE function returns an #NUM! if alpha is less than 0 (zero) or more than 1.

## Functions in this article

### Functions in 'Compatibility' category

The CONFIDENCE function is one of many functions in the 'Compatibility' category.

Calculates the beta distribution, it represents outcomes in the form of probabilities.

Calculates the inverse of the beta distribution.

Calculates the individual term binomial distribution probability

Calculates the probability of the chi-squared distribution.

Calculates the inverse probability of the chi-squared distribution.

Calculates the test for independence, the value returned from the chi-squared statistical distribution and the correct degrees of freedom. Use this function to check if hypothesized results are valid.

Calculates the confidence interval for a population mean, using a normal distribution.

Calculates the covariance meaning the average of the products of deviations for each pair in two different datasets.

Calculates the minimum value for which the binomial distribution is equal to or greater than a given threshold value.

Calculates the exponential distribution representing an outcome in the form of probability.

Calculates the F probability of the right-tailed distribution for two tests.

Rounds a number down, toward zero, to the nearest multiple of significance.

Calculates a value based on existing x and y values using linear regression. Use this function to predict linear trends.

Calculates the value from an F-test. The value shows if the variances from two data sets are not significantly different.

Calculates the gamma often used in queuing analysis (probability statistics).

Calculates the cumulative lognormal distribution of argument x, based on a normally distributed ln(x) with the arguments of mean and standard_dev.

Calculates the most frequent number in a cell range.

Calculates the percent rank of a given number compared to the whole data set.

Returns the quartile of a data set, use the QUARTILE function to divide data into groups.

Calculates the rank of a specific number compared to a list of numbers.

Calculates the standard deviation of a group of values.

### Excel function categories

Excel functions that let you resize, combine, and shape arrays.

Functions for backward compatibility with earlier Excel versions. Compatibility functions are replaced with newer functions with improved accuracy. Use the new functions if compatibility isn't required.

Perform basic operations to a database-like structure.

Functions that let you perform calculations to Excel date and time values.

Let's you manipulate binary numbers, convert values between different numeral systems, and calculate imaginary numbers.

Calculate present value, interest, accumulated interest, principal, accumulated principal, depreciation, payment, price, growth, yield for securities, and other financial calculations.

Functions that let you get information from a cell, formatting, formula, worksheet, workbook, filepath, and other entitites.

Functions that let you return and manipulate logical values, and also control formula calculations based on logical expressions.

These functions let you sort, lookup, get external data like stock quotes, filter values based a condition or criteria, and get the relative position of a given value in a specific cell range. They also let you calculate row, column, and other properties of cell references.

You will find functions in this category that calculates random values, round numerical values, create sequential numbers, trigonometry, and more.

Calculate distributions, binomial distributions, exponential distribution, probabilities, variance, covariance, confidence interval, frequency, geometric mean, standard deviation, average, median, and other statistical metrics.

Functions that let you manipulate text values, substitute strings, find string in value, extract a substring in a string, convert characters to ANSI code among other functions.

Get data from the internet, extract data from an XML string and more.

## Excel categories

Latest updated articles.

More than 300 Excel functions with detailed information including syntax, arguments, return values, and examples for most of the functions used in Excel formulas.

More than 1300 formulas organized in subcategories.

Excel Tables simplifies your work with data, adding or removing data, filtering, totals, sorting, enhance readability using cell formatting, cell references, formulas, and more.

Allows you to filter data based on selected value , a given text, or other criteria. It also lets you filter existing data or move filtered values to a new location.

Lets you control what a user can type into a cell. It allows you to specifiy conditions and show a custom message if entered data is not valid.

Lets the user work more efficiently by showing a list that the user can select a value from. This lets you control what is shown in the list and is faster than typing into a cell.

Lets you name one or more cells, this makes it easier to find cells using the Name box, read and understand formulas containing names instead of cell references.

The Excel Solver is a free add-in that uses objective cells, constraints based on formulas on a worksheet to perform what-if analysis and other decision problems like permutations and combinations.

An Excel feature that lets you visualize data in a graph.

Format cells or cell values based a condition or criteria, there a multiple built-in Conditional Formatting tools you can use or use a custom-made conditional formatting formula.

Lets you quickly summarize vast amounts of data in a very user-friendly way. This powerful Excel feature lets you then analyze, organize and categorize important data efficiently.

VBA stands for Visual Basic for Applications and is a computer programming language developed by Microsoft, it allows you to automate time-consuming tasks and create custom functions.

A program or subroutine built in VBA that anyone can create. Use the macro-recorder to quickly create your own VBA macros.

UDF stands for User Defined Functions and is custom built functions anyone can create.

A list of all published articles.

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