TTEST
TheTTEST
formula is a statistical formula used to determine the probability of two sample means being equal. It is commonly used in hypothesis testing to determine if there is a significant difference between two sets of data. The formula returns the probability value associated with a ttest, which can be used to determine if the null hypothesis should be rejected or not.
 How to use
TTEST
formula?  Examples of using
TTEST
formula TTEST
formula not working? Similar formulas to
TTEST
Usage
Use the TTEST
formula with the syntax shown below, it has 3 required parameters and 1 optional parameter:
 range1 (required):
The first range of data for the ttest.  range2 (required):
The second range of data for the ttest.  tails (required):
The number of tails for the distribution. Should be either 1 (onetailed) or 2 (twotailed).  type (optional):
The type of ttest to perform. Should be either 1 (paired) or 2 (unpaired). Defaults to 2 if not specified.
Examples
Here are a few example use cases that explain how to use theTTEST
formula in Google Sheets.
Comparing two sets of data
You can use TTEST
to determine if there is a significant difference between two sets of data. For example, you might use it to compare the effectiveness of two different marketing campaigns.
Analyzing survey results
If you have two sets of survey results, you can use TTEST
to see if there is a significant difference between the two groups. This can help you draw conclusions about the effectiveness of your survey questions.
Determining statistical significance
You can use TTEST
to determine if the difference between two groups is statistically significant. This can help you draw more accurate conclusions from your data.
Common Mistakes
TTEST
not working? Here are some common mistakes people make when using the TTEST
Google Sheets Formula:
Using nonnumerical data
The TTEST
formula can only be used with numerical data. If nonnumerical data is used, the formula will return an error. Make sure that the ranges being used in the formula only contain numerical data.
Using ranges with different sizes
The TTEST
formula requires that the ranges being compared have the same number of values. If ranges with different sizes are used, the formula will return an error. Make sure that the ranges being used in the formula have the same number of values.
Not specifying the number of tails
The TTEST
formula requires that the number of tails is specified in the formula. If this parameter is not included, the formula will return an error. Make sure that the number of tails is specified in the formula.
Related Formulas
The following functions are similar to TTEST
or are often used with it in a formula:

AVERAGE
The AVERAGE function calculates the average (arithmetic mean) of the values passed to it. It is commonly used to find the average of a range of cells containing numerical data.

STDEV
The
STDEV
function calculates the standard deviation of a set of numbers. It measures the amount of variation or dispersion of a set of values from the average (mean) value. It is commonly used in statistics to determine the spread of a data set. The values can be supplied as individual cells, ranges, or constants. 
CORREL
The
CORREL
formula returns the correlation coefficient between two sets of data. This coefficient represents the strength of the linear relationship between the two sets of data, with values ranging from 1 (perfect negative correlation) to 1 (perfect positive correlation). 
ZTEST
The ZTEST function in Google Sheets returns the onetailed probabilityvalue of a ztest. It is used to determine whether a sample mean is significantly different from a hypothesized value, assuming a known population standard deviation. This function is typically used in hypothesis testing and statistical analysis.
Learn More
You can learn more about the TTEST
Google Sheets function on Google Support.