10 Matching Annotations
1. Mar 2023
2. www.statology.org www.statology.org
1. Some people argue that the Welch’s t-test should be the default choice for comparing the means of two independent groups since it performs better than the Student’s t-test when sample sizes and variances are unequal between groups, and it gives identical results when sample sizes are variances are equal. In practice, when you are comparing the means of two groups it’s unlikely that the standard deviations for each group will be identical. This makes it a good idea to just always use Welch’s t-test, so that you don’t have to make any assumptions about equal variances.

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3. Jan 2023
4. www.investopedia.com www.investopedia.com
1. T-Test: What It Is With Multiple Formulas and When To Use Them

https://www.investopedia.com/terms/t/t-test.asp A t-test is an inferential statistic used to determine if there is a significant difference between the means of two groups and how they are related. T-tests are used when the data sets follow a normal distribution and have unknown variances, like the data set recorded from flipping a coin 100 times.

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5. www.scribbr.com www.scribbr.com
1. An Introduction to t Tests | Definitions, Formula and Examples

How to TTEST

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6. Apr 2022
1. difference between SD and SEM

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8. towardsdatascience.com towardsdatascience.com
1. In this case, for a test to be statistically significant, p-value must be lower than 0.05.

statistical significance should be less than 5%

tf your confidence that the results are not due to chance is 95%

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9. www.stat.colostate.edu www.stat.colostate.edu
1. We are 99% confident that the true average “attitude” difference betweenliving environments is between 1.32 and 7.88. At a significance level of 0.01we can say that living in a minority environment is associated with higherscore

99% confident that the true average (result) is between these two numbers;

at 1% (0.01) significance, we can scientifically assume there is a causal relationship

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10. Jan 2022
11. sheetstutorial.com sheetstutorial.com
1. How to do t test in google sheets

T-test tutorial

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12. Feb 2021
1. ReconfigBehSci. (2020, November 21). RT @DrEricDing: Good question for immunologists like @michaelmina_lab @VirusesImmunity and @PeterHotez. Https://t.co/Rs1zaUPznm [Tweet]. @SciBeh. https://twitter.com/SciBeh/status/1334804615842439170

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14. Dec 2020
15. www.investopedia.com www.investopedia.com
1. Essentially, a t-test allows us to compare the average values of the two data sets and determine if they came from the same population.

Comparing datasets to see if they came from the same population.

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16. Oct 2020
17. www.ibm.com www.ibm.com
1. The GROUPS subcommand specifies an unknown variable or a long string variable.

The GROUPS subcommand specifies an unknown variable or a long string variable.