QI Macros compares the p-value (0.818) to the significance level (0.05) and tells you "Cannot Reject the Null Hypothesis because p>0.05 (Means are not Different/Means are the Same)." QI Macros will perform the calculations and interpret the results for you:.Next QI Macros will prompt for the hypothesized difference in the means (default is 0).Note: Significance Level = (1 - Confidence Level). QI Macros will prompt you for a significance level:.Select the data and click on QI Macros Menu > Statistical Tools > F & t Tests > t-Test: Two-Sample Assuming Equal Variances or Unequal Variances, depending on the f test results:.Run an F-test on the data to determine if the variances are equal or unequal.It will run an f test and then automatically choose the right t test for you. In order to select the correct Two Sample t-Test, you need to determine if the variances are equal or unequal. Formula of unpaired two-samples t-test If the variance of the two groups are equivalent (homoscedasticity), the t-test value, comparing the two samples (A and. Next Determine if the Variances are Equal or Unequal You test five samples of each to get the data: Lets say you're producing rubber made from two different recipes and you want to know if the tensile strengths are the same or different. If there is no information about the equality of the population variance, then we must apply the two independent sample t test with unequal variances. Excel can't give you a Box and Whisker chart of the two factors QI Macros Add-in can! In case of independent samples, where the population variances are assumed to be equal, a two-sample pooled t test is used.Excel won't interpret your p-value for you QI Macros Add-in will!.Excel's interface can be confusing QI Macros adds a new tab to Excel's menu making t-Tests point-and-click simple.
Statistical Analysis Excel » Two-Sample t-Test Two-Sample t-Test in Excel You can do a t-Test in Excel using the Data Analysis Toolpak, but.
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