2 Sample T-test

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What is 2 Sample T-test?

The 2 Sample T-test is a statistical test that allows you to compare the means of two independent groups to determine if there is a significant difference between them. It is commonly used to analyze data from experiments or studies where two different treatments or conditions are being compared. By conducting this test, you can determine if the difference between the means is due to chance or if it is statistically significant.

What are the types of 2 Sample T-test?

There are three main types of 2 Sample T-tests: 1. Independent Samples T-test: This type of test is used when the two groups being compared are unrelated or independent of each other. It compares the means of two different populations or groups. 2. Paired Samples T-test: This type of test is used when the two groups being compared are related or dependent on each other. It compares the means of the same population or group at different time points or under different conditions. 3. Welch's T-test: This type of test is used when the two groups being compared have unequal variances. It is a modified version of the Independent Samples T-test that provides accurate results even when the assumption of equal variances is violated.

Independent Samples T-test
Paired Samples T-test
Welch's T-test

How to complete 2 Sample T-test

To complete a 2 Sample T-test, follow these steps:

01
Determine the appropriate type of 2 Sample T-test based on your data and research question.
02
Collect the necessary data for both groups you want to compare.
03
Calculate the mean and standard deviation for each group.
04
Perform the 2 Sample T-test using a statistical software or online calculator. This will produce a t-value and p-value.
05
Interpret the results by comparing the obtained p-value with a predetermined significance level (e.g., 0.05). If the p-value is lower than the significance level, it indicates a statistically significant difference between the means of the two groups.
06
Report the findings, including the t-value, degrees of freedom, and p-value.

By following these steps, you can confidently complete a 2 Sample T-test and draw meaningful conclusions from your data.

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Questions & answers

The t-test produces two values as its output: t-value and degrees of freedom. The t-value, or t-score, is a ratio of the difference between the mean of the two sample sets and the variation that exists within the sample sets. The numerator value is the difference between the mean of the two sample sets.
The t-Test Paired Two Sample for Means tool performs a paired two-sample Student's t-Test to ascertain if the null hypothesis (means of two populations are equal) can be accepted or rejected. This test does not assume that the variances of both populations are equal.
Types of t-tests There are three t-tests to compare means: a one-sample t-test, a two-sample t-test and a paired t-test. The table below summarizes the characteristics of each and provides guidance on how to choose the correct test.
=T.TEST(array1,array2,tails,type) The formula uses the following arguments: Array1 (It is a required argument) – The first data set. Array2 (It is a required argument) – The second data set. Tails (It is a required argument) – Specifies if it is a one-tailed or two-tailed test.
1:25 8:45 How to do a Two Sample (Independent) t-Test in Excel 2016 YouTube Start of suggested clip End of suggested clip If not you should check out the video on how to install it comes free with Excel. We choose dataMoreIf not you should check out the video on how to install it comes free with Excel. We choose data analysis. And we're going to choose descriptive. Statistics. Press ok now the input range let's get the
Independent two-sample t-test. Paired sample t-test.
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