All Questions
Tagged with two-sample t-test
29
questions
1
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0
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86
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Comparing means in Box-Cox transformed data
Deeply sorry as this wasn't really covered in my statistics classes. I am current comparing datasets for people divorcing vs. dissolving their marriages. I have two variables, length of marriage, and ...
- 11
1
vote
1
answer
268
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When transforming a dataset using the square root (or any other procedure), does the standard deviation of the dataset get transformed too?
Taking an introductory statistics course, and I am confused about the impact of a transformation on the df for a two-sample t-test. The df is dependent on n of each sample and SD of each sample, but I'...
- 11
2
votes
1
answer
105
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Doing a t-test on a normally distributed difference of two non normal distributions
I have two populations of donations (segment 2 people were subject to a different form):
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3
votes
3
answers
182
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T-test states difference of donation is significant when Z-test claims not, what method to use?
I have two populations who have been exposed to two different websites that should bring them to donations: one with a progress bar that pushes them to give (B, segment 2) and the other not (A, ...
0
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1
answer
230
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t-statistic varies widely when used for bootstrap sampling process
I have two samples of size 20 and I want to see if the difference between the geometric means is significant using two-sample t-statistic and bootstrap sampling.
Here is what I'm doing
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- 145
8
votes
2
answers
36k
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what is the difference between a two-sample t-test and a paired t-test
While I was glancing at hypothesis tests, I saw paired and two-sample t-test but couldn't understand the difference. For the explanation of these two tests, I saw the following sentence
" Two-...
- 505
5
votes
1
answer
2k
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R function for weighted two-sample t-test **with Welch-adjusted t statistic**?
I'm conducting a hypothesis test for the difference between two groups. The file dat1 contains all observations of measure for ...
- 129
1
vote
1
answer
211
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Confused about Two Sample Proportion Tests - am I performing this correctly?
I am dealing with an advertising dataset that includes hundreds of advertisements, how many clicks each ad receives, whether the amount of clicks received is considered "high" or "low&...
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1
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0
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180
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Two-sample test when samples are not completely independent?
Let's say I measure the height of 100 individuals every week in both Illinois and Texas while allowing for the same individual to be measured multiple times in the following weeks. This way, my ...
- 11
1
vote
2
answers
823
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Performing a two sample t-test for equal means on subset of a dataset
If I have a dataset that, of among other variables, contains the gender and wealth for a sample of a population with a year variable that represents the year the data about the individual was ...
- 11
2
votes
1
answer
3k
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How to interpret results of two-sample, one-tailed t-test in Scipy
I want to perform a two-sample, one-tailed t-test to compare two means. For the specific problem I am looking, I want the comparison to only be in one direction. I would like the null hypothesis to be ...
- 1,030
0
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0
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186
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Two-sample t test with before and after experiment data
I have data with the following columns:
Person id, achievement before treatment, achievement after treatment (timewise)
Each person is put into a control or treatment group. Because the data is ...
1
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0
answers
73
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Which statistical method do I need for my research (combining correlation and independent two-samples t-test?) [closed]
I need some guidance with my model, because I believe I need both correlation as well as an independent two samples t-test for my research.. is that even a thing?
My model claims that firm ...
- 11
0
votes
0
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21
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Testing significance: single population, two-sample unpaired data
I am looking to test the significance of a training/ education program of home building construction. I am working with unpaired data of a dependent sample and am unsure how to proceed. Since the ...
1
vote
1
answer
763
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Is Kolmogorov-Smirnov test known to fail in some special cases?
I would like to use two samples Kolmogorov-Smirnov test to check if two given samples are coming from different distributions. For that I use scipy implementation of the KS test.
I have found out ...
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