Questions tagged [hypothesis-testing]

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How long have people been debunking the P value (statistical significance) as commonly used in the media and human sciences? [closed]

I have been puzzled for a long time at the way psychologists and medical researchers state that they have 'significant' results, and at the way this statement is relayed to the public who are misled ...
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How to do a t-test on rare events distributions?

I have a dataset, which contains several features (feature_1, feature_2, ..., feature_n) and ...
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How to apply Hypothesis test on time series?

I am working on a project that is related to Wikipedia's revision history. I have around 10 time-series and each one represents how the relative frequency of positive words changes over time. I need ...
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1answer
73 views

p-value and effect size

Is it correct to say that the lower the p-value is the higher is the difference between the two means of the two groups in t-test? For example, if I apply the t-test between two groups of measurements ...
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83 views

How do you use KS-test in a data science report?

I'm writing a data science report, I want to find an exist distribution to fit the sample. I got a good looking result , but when I use KS-test to test the model, I got a low p-value,1.2e-4, ...
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1answer
97 views

When to use which multiple testing correction?

There are a large number multiple testing p-value correction methods. e.g.: ...
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1answer
34 views

How to deal with missing values in the survey data to perform Paired sample t test

I have a dataset where I have 100 respondents. Each respondent has to give response on service quality of Health care equipment. Is it providing efficient services to the patients? We have two ...
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18 views

How to think about design of experiments in the context of more complex machine learning [closed]

I have experience with multifactor DoE, but in the context of optimizing treatment of a single or or a small number of populations. Are there any articles people recommend to help get my head around ...
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37 views

Hypothesis Testing - Median Test for linear regression model given standard error and co-efficient

I need help approaching this particular problem on hypothesis testing. A researcher believes that a diet high in raw cornstarch would increase the median blood glucose levels by 20. The diet can ...
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14 views

How to compare between two datasets of lexical density?

I have two dataset from two different texts representing lexical density as a proportion based on a corpus. Both datasets are represented in the images below. Now, let's suppose I want to know which ...
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1answer
37 views

How can I compare the grammatical complexity between two texts using their sentences dependency length?

This is a continuation to the following thread. I have two texts, common English texts such as news articles and informative texts versus a technical textbook. I want to compare the grammatical ...
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statsmodels: significance test (claim test), one sample, mean value - any function available?

We sample the bacteria contents of drinking water. Fact: when bacteria contents > 88, water is not safe to drink. These are the samples we've obtained: ...
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Python: significance test (claim), one sample, test the proportion - simpler code

We have two sheets with pictures of dogs and dog owners. On one sheet - owners and their dogs are associated correctly. The other sheet shows random associations between owners and dogs. 61 students ...
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Hypothesis Testing on Prediction from Random Forest Classifier

I used a random forest classifier to predict 0,1, 0 indicating non-prevalence of a disease, and 1 indicating the disease is prevalent. I want to see if having a feature would increase the chance of ...
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1answer
103 views

Interpreting the results based on Granger Causality test

I am trying to use Granger Causality test: https://www.statsmodels.org/stable/generated/statsmodels.tsa.stattools.grangercausalitytests.html to assess whether "positivity score" affects ...
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1answer
30 views

Permutation test on two groups

I am trying to use a permutation test to test my hypothesis. I want to make sure I am understanding concept of permutation correctly. I have control and experimental group. Then I combine them and ...
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467 views

A/B testing: How to calculate p-value on post test segments?

My question on A/B testing is about doing post test segmentation analysis. For example: I run an A/B test on my website to track bounce rate. On the treatment group, i put a video to explain ...