# Questions tagged [hypothesis-testing]

Hypothesis testing assesses whether data are inconsistent with a given hypothesis rather than being an effect of random fluctuations.

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### Why is the two-sample test giving me inconsistent results?

I am applying a two-sample t-test to determine whether we have software regressions on latency measurements. Procedure Run the test for build b1 and gather 60 latency measurements. Run the test for ...
1answer
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### How to interptet Jensen Alpha statistical significance?

When you regress portfolio excess returns against relative benchmark excess return you get a model in which the beta (slope) could be interpreted as the one you get from the CAPM, that is systemic ...
1answer
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### More than two periods' hypothesis testing

I want to test more than two periods' income from different goods. I want to know if my new sales strategy has had a significant impact on my income. Example: ...
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### Which to Use: Likelihood Ratio Test or Uniformly Most Powerful Test?

I've recently been learning about MPTs (most powerful tests), UMPTs (uniformly most powerful tests) and LRTs (likelihood ratio tests), and do not totally understand in which context the different ...
1answer
230 views

### Adjust ROC analysis for multiple testing?

we did an exploratory prospective study in medicine in order to find parameters which are able to predict a specific post-surgical event (0/1) before the actual surgery. We have about 10 parameters ...
0answers
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### How to test the difference between dependent partial correlations in the presence of autocorrelation?

Background and what I am trying to do: I have a single dependent variable $Y$, and $K$ independent variables of interest ($X_1, X_2... X_k$). I also have a single independent variable of non-interest, ...
1answer
359 views

### How to run Friedman test correctly across three sets of questionnaire data divided into sub-groups?

I am trying to evaluate the usability of three prototypes of an application and want to see if there is a significant difference in terms of usability. For this I have collected responses from users ...
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### Why we use the number of params as degree of freedoom in the F test for regression?

In a linear regression, we can assume that $\frac{(SSD_y - SSR)/p-1}{SSR/(n-p-1)}$ have a $F$ distribution if the null hypothesis $Ho$ is true, with $SSR$ being the sum of residues of the regression ...
2answers
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### Choosing a test for questionnaire analysis

I want to analyse the data from the following experiment setup: Participants were divided into three groups, each group read a story and had to anwser a question by choosing option A or B. The age, ...
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### spatial correlation between two hexa/density maps

I was working on a report and was faced with a question regarding maps and spatial analysis. I want to compare some maps and find the similarities/differences among them. The maps represent the sum of ...
1answer
54 views

### What does it mean that the p-value is a function of the sample size?

I have heard the phrase the "p-value a function of the sample size" but am not sure if I really understand what it is saying. I normally refer to thinking about a t-test where the t-...
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### Proper Test for Type of Data

Warning: I have not done any statistical analysis since 2012. Problem: I have a list of lists of lists: Each of the $289$ ($17\times 17$) element is \$\{\phi_{j,1},\phi_{j,2},f(\phi_{j,1},\phi_{j,2}),\{...
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### How to select variables for Little´s Test?

Lets assume there are 150 variables in a Dataset. For my analysis I only use around 50 of them. Of those 50 variables, there are 18 Variables which contain missing values. How should I perform the ...
1answer
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### How to statistically test data points that are coming from two groups of distributions?

Suppose we have two groups of data points, i,e, A and B, and we want to know if they are coming from two different distributions or just one? The candidate solutions are standard t-test or Kolmogorov ...
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### Correct test to verify that data stems from a (given) non-stationary categorical time-series

I have a categorical random variable that can take one of 3 values (red, blue, green). The variable is called Guess and - over the course of a time-continuous ...