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Questions tagged [statistical-test]

A statistical test provides a mechanism for making quantitative decisions about a process or processes.

Statistical Tests

A statistical test provides a mechanism for making quantitative decisions about a process or processes. The intent is to determine whether there is enough evidence to reject a conjecture or hypothesis about the process. The conjecture is called the null hypothesis. Not rejecting may be a good result if we want to continue to act as if we believe the null hypothesis is true. Or it may be a disappointing result, possibly indicating we may not yet have enough data to prove something by rejecting the null hypothesis.

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R: How to perform student's t-test?

I want to perform student's t-test on the res.gs dataframe, where the samples are either is.mut or is.wt. # Students' T-test without KMT2C gene is.mut <- grepl('^[^0]', nokmt2c.res.gs$n_mutated_group1) is.wt <- !grepl('^[^0]',…
melolili
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R: 1-factor ANOVA with 4-levels

I want to measure the 1-factor ANOVA with 4-levels: ctl against schiz, bp, dep. I'm expecting the aov.run to return a numeric vector with 3 variables, since I'm comparing ctl against the other three levels. However, I'm only getting 2 variables in…
melolili
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How should you test the significance of 2 classification accuracy scores: paired permutation test

I have a single trained classifier tested on 2 related multiclass classification tasks. As each trial of the classification tasks are related, the 2 sets of predictions constitute paired data. I would like to run a paired permutation test to find…
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0 How can I use a statistical test with this dataset? (p-value > 1)

I've tried to have a T-test model for answering one of my questions. To do so, I create a subset data, then applied chi-square test to see whether data is proper for T-test or not. According to the results, p-value shown approximately 3.5, which is…
Merve
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Critical difference plot

I need help regarding generating the critical difference (CD) plot of my groups using python import Orange import matplotlib.pyplot as plt names = ["M1", "M2", "M3", "M4", "M5", "M6", "M7", "M8", "M9", "M10", "M11", "M12", "M13" ] avranks…
OMOMULE KEHINDE
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How to define a model for dunnett's comparisons between specific treatments and controls

I am analyzing unbalanced non normal data. After significant kruskal wallis, I want to perform a Multiple Comparisons of Means: Dunnett Contrasts. I defined a model (see below) but this does not give me the comparisons between each treatment and…
Microbiologie13
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How to get a partial regression plot in R?

Cow Western Ashely Jerzy 24.3 34.3 50 45 30.2 35.3 54 45 49 45 540 4353 70 60 334 343 69 80 54 342 I looked up online and in couple books regarding this however I couldn't find a helpful information. Could you just give me a…
fashionable
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How to condense a matrix for McNemar sig testing using R?

I have survey data I am looking to test for significance, specifically between two questions (a2 and a3). The sample between the two questions is non mutually exclusive so I am hoping to apply the mcnemar test. The response matrix is: I need to…
Beginner Java
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Multiple measures model statistical tests

What test to conduct when I wanna see if different measures vary in the same way for all subjects. I’m working on glucose data and have repetitive measures for blood glucose levels throughout the day. I want to see if the levels of fasting glucose…
ramonitzzz
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Dieharder test with binary file

I have a binary file containing 10^8 binary digits. I want to give it input as 100 sequence each of 1000000 bits in dieharder test . I have given the command as dieharder -g 201 -f pseudoseq202.bin -a But all the tests fails. I think I need to…
Shyamalendu Kandar
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Purposes of two-sided/one-sided specific while testing independence with Fisher's exact test, Chi-square test

I'm struggling to understand the operation behind Fisher's exact test & Chi-squared test. As I understand, both of the tests do the same thing that is to test for the independence between 2 categorical data. For example, I have the contingency table…
NganKD
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Comparing means with Scipy: Direction of difference

I am comparing two columns from two different dataframes. All participants come from the same population/dataset. I want to check whether the average diastolic blood pressure differed across patients and their matched controls. I have uploaded the…
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Installing "aspace" package in R

I am trying to install the R package aspace but i get an error message that reads: install.packages("aspace") # WARNING: Rtools is required to build R packages but is not currently # installed. Please download and install the appropriate version…
Ishman
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How do I write a polynomial function with my independent variable log transformed given the coefficients?

Forewarning: I am a complete noob, so I'm sorry for the dumb question. I've tried everything trying to figure out how to write out the actual polynomial function given these coefficients. Coefficients: Estimate Std.…
esorkin1
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log2 p-value of 1 after Holm-Bonferroni correction

I obtained rawp by performing Student's t-test function on dat.filtered and then I performed correction using Holm and Holm-Bonferroni methods. I have a huge increase in log2 adjusted p-value of 1.0. Is that normal? # Eliminate probes with rowMeans…
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