Hypothesis Testing T Test Formula. Total number of values in second set. The formula for standard deviation is given by.
Where overline x is the sample mean. Total number of values in second set. A t test for one mean is a hypothesis test that attempts to make a claim about the population mean.
In this formula t is the t value x1 and x2 are the means of the two groups being compared s2 is the pooled standard error of the two groups and n1 and n2 are the number of observations in each of the groups.
The denominator measures the standard error of the mean. Total number of values in second set. This t test unlike the z test does not need to know the population standard deviation. Write an equal sign and then the value of the test statistic 2 decimal places 4.
