Search results
31 sty 2020 · A t test is a statistical test that is used to compare the means of two groups. It is often used in hypothesis testing to determine whether a process or treatment actually has an effect on the population of interest, or whether two groups are different from one another.
- Chi-Square
What is a chi-square test? Pearson’s chi-square (Χ 2) tests,...
- Simple Linear Regression
Because the data violate the assumption of homoscedasticity,...
- Standard Deviation
With samples, we use n – 1 in the formula because using n...
- ANOVA in R
ANOVA in R | A Complete Step-by-Step Guide with Examples....
- Correlation Coefficient
What does a correlation coefficient tell you? Correlation...
- Linear Regression in R
Step 2: Make sure your data meet the assumptions. We can use...
- Chi-Square
T-tests analyze hypotheses about one or two sample means. Learn how t-tests use t-values and t-distributions to compute probabilities and test hypotheses.
What is a T Test? A t test is a statistical hypothesis test that assesses sample means to draw conclusions about population means. Frequently, analysts use a t test to determine whether the population means for two groups are different.
How does a t test work? Based on your experiment, t tests make enough assumptions about your experiment to calculate an expected variability, and then they use that to determine if the observed data is statistically significant. To do this, t tests rely on an assumed “null hypothesis.”
In this one, you’ll understand when to use the T-Test, the different types of T-Test, math behind it, how to determine which test to choose in what situation and why, how to read from the t-tables, example situations and how to apply it in R and Python.
The t test tells you how significant the differences between group means are. It lets you know if those differences in means could have happened by chance. The t test is usually used when data sets follow a normal distribution but you don’t know the population variance.
20 kwi 2016 · How do t-tests work? How do t-values fit in? In this series of posts, I’ll answer these questions by focusing on concepts and graphs rather than equations and numbers. After all, a key reason to use statistical software like Minitab is so you don’t get bogged down in the calculations and can instead focus on understanding your results.
