This calculator uses a two-samplettest, which compares two datasets to see if their means are statistically different. That is different from aone samplettest, which compares the mean of your sample to some proposed theoretical value. The most general formula for attest is composed of two means...
This calculator will tell you the (two-tailed) effect size for a Student t-test (i.e., Cohen's d), given the mean and standard deviation for two independent samples of equal size. Please enter the necessary parameter values, and then click 'Calculate'. ...
This calculator will tell you the Student t-value for a given probability and degrees of freedom. Student t-values for both one-tailed (right-tail) and two-tailed probabilities will be returned.Please enter the necessary parameter values, and then click 'Calculate'.Degrees...
The t-distribution calculator makes it easy to compute thecumulative probabilityassociated with at scoreor with a sample mean. For help in using the calculator, read theFrequently-Asked Questionsor review theSample Problems. To learn more about Student's t-distribution, go to Stat Trek'stutorial...
For most T-distribution questions, you’ll usually be given all of the information you need to plug into the calculator and retrieve the T score. You might be asked to find the area under a T curve, or (like Z scores), you might be given a certain area and asked to find the T sc...
As long as you’re using statistical software, such asthis two-sample t test calculator, it’s just as easy to calculate a test statistic whether or not you assume that the variances of your two samples are the same. If you’re doing it by hand, however, the calculations get more comp...
To find the probability associated with a t statistic, use a t-distribution table (found in the appendix of most introductory statistics texts), a graphing calculator, an online t-distribution calculator, like Stat Trek's T Distribution Calculator....
Use the t tables, software, or a calculator to estimate the values asked for in parts (a) and (b) below. What is the P-value for t greaterthanorequalto 2.18 with 5 degrees of freedom? (Round to three What are the degrees of free...
The calculator assumes that all samples have the same Skewness and Kurtosis. Monte Carlo Simulation The data for minimum sample size formulas are derived from extensive Monte Carlo simulations for n = 2 to 2000. Observed alpha values were determined empirically from the p-values of 100,000 replic...
This calculator will tell you the observed power for a one-tailed or two-tailed t-test study, given the observed probability level, the observed effect size, and the total sample size. Please enter the necessary parameter values, and then click 'Calculate'. ...