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Windows 11CONFIDENCE.T function - The function returns the confidence interval of the population by using the Student's t-distribution in Excel
The following article introduces you to the CONFIDENCE.T function - one of the functions in the statistical group is very popular in Excel.
Description: The function returns the confidence interval of the population by using the Student's t-distribution. Support functions from Excel 2010 onwards.
Syntax: CONFIDENCE.NORM (alpha, standard_dev, size)
Inside:
- alpha: The critical level to calculate the confidence level, with confidence level = 100 * (1- alpha) , is the required parameter .
- standard_dev: The overall standard deviation for the data range, and considered to have been determined, is the required parameter.
- size: Sample size , is a required parameter.
Attention:
- If any of the parameters' values are not numeric -> the function returns the #VALUE! Error value .
- If alpha ≤ 0 or alpha ≥ 1 -> the function returns the #NUM! Error value
- If standard_dev ≤ 0 -> the function returns the #NUM! Error value
- If size is not an integer -> it is truncated to an integer.
- If size = 1 -> the function returns the # DIV / 0 error value !
For example:
Calculate the average overall confidence interval based on the Student's t-distribution with the data in the table below:
- In the cell to calculate, enter the formula: = CONFIDENCE.T (D6, D7, D8)
- Press Enter -> the overall confidence interval for the population is:
- Where alpha ≤ 0 or alpha ≥ 1 -> the function returns the #NUM! Error value
- Where size = 1 -> the function returns the error value #NUM!
Above are instructions and some specific examples when using the CONFIDENCE.T function in Excel.
Good luck!
Jessica TannerYou should read it
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