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  2. T test calculator - GraphPad

    www.graphpad.com/quickcalcs/ttest1

    Performs unpaired t test, Weldh's t test (doesn't assume equal variances) and paired t test. Calculates exact P value and 95% confidence interval. Clear results with links to extensive explanations.

  3. One sample t test - GraphPad

    www.graphpad.com/quickcalcs/oneSampleT1

    This example illustrates how each type of t test could be chosen for a specific analysis, and why the one sample t test is the correct choice to determine if the measured pH of the bottled water samples match the advertised pH of 8.5.

  4. The Ultimate Guide to T Tests - GraphPad

    www.graphpad.com/guides/the-ultimate-guide-to-t-tests

    If you’re wondering how to do a t test, the easiest way is with statistical software such as Prism or an online t test calculator. If you’re using software, then all you need to know is which t test is appropriate ( use the workflow here ) and understand how to interpret the output.

  5. GraphPad QuickCalcs: Analyze continuous data

    www.graphpad.com/quickcalcs/contMenu

    Descriptive statistics, detect outlier, t test, CI of mean / difference / ratio / SD, multiple comparisons tests, linear regression.

  6. How to organize data for the GraphPad t test calculator

    www.graphpad.com/quickcalcs/tTestArrange

    This calculator is set up for you to enter data in a format that is natural to many scientists. For example, to compare the blood pressure of a group of men and a group of women, enter the men's blood pressure in one column and the women's blood pressure in another.

  7. GraphPad Software

    www.graphpad.com/quickcalcs

    Calculate P from t, z, r, F or chi-square, or vice-versa. View Binomial, Poisson or Gaussian distribution. Correct a P value for multiple comparisons and Bayes.

  8. Analyze a 2x2 contingency table - GraphPad

    www.graphpad.com/quickcalcs/contingency1

    This calculator is for 2x2 contingency tables that separate each subject into one of four categories based on two factors, each with two possibilities. Simply label the rows and columns, then type in the counts for each cell to test the relationship between the two factors.

  9. Q&A: Choosing a test to compare two groups - GraphPad

    www.graphpad.com/guides/prism/latest/statistics/stat_qa_choosing_a_test_to...

    The t test compares the difference between two means and compares that difference to the standard error of the difference, computed from the standard deviations and sample size. If you only know the two means, there is no possible way to do any statistical comparison.

  10. P Value Calculator - GraphPad

    www.graphpad.com/quickcalcs/pValue1

    Use this calculator to compute a two-tailed P value from any Z score, T score, F statistic, correlation coefficient (R), or chi-square value. Once you have obtained one of these statistics (from a publication or even another program) the P value helps interpret its statistical significance.

  11. Sign and binomial test - GraphPad

    www.graphpad.com/quickcalcs/binomial1

    Use the binomial test when there are two possible outcomes. You know how many of each kind of outcome (traditionally called "success" and "failure") occurred in your experiment. You also have a hypothesis for what the true overall probability of "success" is.