T-Test Calculator Compare the means of two samples using a single-sample or two-sample t-test below. Results: Two-tailed P: Left-tailed P: Right-tailed P: Test Statistic (t): Degrees of Freedom (df): Learn how we calculated thisbelow...
Test Statistic Comparing Two Means CalculatorMean of x, x: Mean of y, y: Standard deviation of the x values, σx: Standard deviation of the y values, σy: Sample Size of the x values, n1: Sample Size of the y values, n2: Test Statistic Comparing Two Population Means: This...
t-Test Calculator is a tool used to determine whether there is a statistically significant difference between the means of two independent groups. What is a t-Statistic? The t-Statistic is a value derived from your sample data that measures the size of the difference relative to the variation...
Choose the alternative hypothesis: two-tailed or left/right-tailed. In our Z-test calculator, you can decide whether to use the p-value or critical regions approach. In the latter case, set the significance level, αα. Enter the value of the test statistic, zz. If you don't know it...
How to use thettest calculator Choose yourdata entry format. This will change how section 3 on the page looks. The first two options are for entering your data points themselves, either manually or by copy & paste. The last two are for entering the means for each group, along with the ...
What if the population standard deviations are known? The main purpose of this calculator is for comparing two population mean when sigma is unknown for both populations. In case that the population standard deviations are known, then you should use instead thisz-test for two means....
How to use thettest calculator Choose yourdata entry format. This will change how section 3 on the page looks. The first two options are for entering your data points themselves, either manually or by copy & paste. The last two are for entering the means for each group, along with the ...
A two-sample t-test (to compare the means for two groups); or A paired t-test (to check how the mean from the same group changes after some intervention). Decide on the alternative hypothesis: Two-tailed; Left-tailed; or Right-tailed. This t-test calculator allows you to use eithe...
Here you can also find a step by step guide forperforming a T-test on your calculator T-values are a unitless statistic, which makes it challenging to interpret on by itself. Let’s say youperform a t-test, and the t-value it produces is 2. What does this mean?
QI Macros built in code compares the p value to alpha and tells you what that means. In the above example, QI Macros tells you "Cannot Reject the Null Hypothesis because p > 0.05 (Variances are not Different).Interactive Results: QI Macros lets you change the significance level (cell E...