Stack Overflow
Stack Overflow

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.

264 questions
0
votes
1 answer

How to conduct an exact Fisher test when I have more than two groups in Python?

My data is the following: prfs ex F M Pref C 11 20 B 15 6 A 3 5 I would like to make an exact Fisher test. There is a function in scipy but accepts only 2x2 contingency tables: stats.fisher_exact(prfs, alternative =…
user8270077
  • 4,621
  • 17
  • 75
  • 140
0
votes
0 answers

How is possible to use glm() function or Bayesian Network in R for equivalency test for binomial data?

Is there any way to use glm() function or Bayesian Network to check whether the two binomial data are equivalent. More to point, I have two binomial (success=1 and failure=0) datasets and intend to apply a statistical test to show whether they are…
nahid khosh
  • 11
  • 4
0
votes
1 answer

MATLAB - Statistical matrices comparison to find relations

I am puzzled by a problem in MATLAB. I wish to do a comparison between two equally sized matrices (100x100) with different values inside. I want to find similiarities or relations between the matrices content. Since both matrices came from different…
Daniel Velden
  • 179
  • 2
  • 17
0
votes
1 answer

R Multiple/Logistic Regression with 3 Variables,Statistical Testing?

I need some help with statistical testing codes. Basically I'm trying to study the relationship between age, political standing and views on cannabis legalisation. The dataset is the British Social Attitudes survey 2010. bsa_2010 <-…
Kaoru Takeda Manimaran
  • 3
  • 4
0
votes
2 answers

R - doParallel does not work with Student and Fisher tests

So I am using the R package doParallel to parallelized some steps of my script when I have to handle large list of elements to compute it faster. Since this time all of the functions I used so far were wroking perfectly well with foreach() : I just…
Yoann Pageaud
  • 412
  • 5
  • 22
0
votes
1 answer

Testing the significance of a vector of correlation coefficients using r

I have a vector of correlation coefficients (r) and a vector containing numbers of observations (n), and I want to test each of them to see whether they significantly differ from 0. r = c(.69,.32,.75,.69,.42,.53,.25,.27,.1,-.15,.48,.39) n =…
FredrikH-R
  • 142
  • 11
0
votes
0 answers

Which test to take when compare two continuous distribution(LIWC score)

I am now working on a project that try to extend the LIWC dictionary to fit our local language (mixed English, Indonesia, Malay and Chinese). We use a word embedding model to find similar words to words in LIWC dictionary, then calculate score based…
Margies Lo
  • 21
  • 2
0
votes
1 answer

When is Multiple Comparison Correction necessary?

I am not very experienced in hypothesis testing and have a problem understanding when Multiple Comparison Problem occurs? As I Understood Multiple Comparison Problem occurs when one tries to perform several statistical tests from a single…
Shirin Najdi
  • 63
  • 2
  • 8
0
votes
2 answers

SAS PROC LOGISTIC - why is Goodness of Fit test rejecting model?

I'm modelling a university applicants dataset using PROC LOGISTIC in SAS (9.2). The target variable is 'Enrolled y/n', and i'm modelling against a range of 13 variables (a mixture of indicator, continuous and class) including: Number of applications…
Jon295087
  • 731
  • 1
  • 8
  • 28
0
votes
1 answer

Statistical tests to data organized by weekdays

I have data where there are numeric values (can be 0 also)for corresponding weekdays (1=monday, 2=tuesday, 7=sunday etc). I want to find out if my values (say, for temperature for example) depends on a weekday (like bigger values on mondays and…
praseodyymi
  • 37
  • 6
0
votes
0 answers

Correlation biplot (scaling 2) and distance biplot (scaling 1) PCA not in the right length in R

I'm running a principal component analysis and I was told that the vector of the scaling 1 are supposed to be of length 1. Here they are enormously bigger than 1. In scaling 2, it's suppose to be less than 1. Am I doing something wrong? Also, is…
M. Beausoleil
  • 3,141
  • 6
  • 29
  • 61
0
votes
0 answers

Multiple Wilcoxon Signed Rank test in R

I have a question about performing multiple Wilcoxon test in R. I have 7 datasets that for each I need to compare 9 different feature extraction methods using 10 classifiers. As they are stochastic methods, I have 10 values/repetitions for each…
It's me again
  • 55
  • 5
0
votes
1 answer

Stationarity test using R

Using the stationarity test I am try to extract the result corresponding to the "p-value for T" line which in this case is 0, but I cannot seem to do it using R. > stationarity(lg.day.ret) 1 2 3 4 5 6 N = 2609, nblock = 11, n_block_max = 238,…
Vik
  • 469
  • 2
  • 6
  • 18
0
votes
1 answer

Meaning of confidence intervals in a graphic of Tukey-HSD statistical test built in R

I did 5x2 cross validation experiments and, after that, I did the Tukey-HSD pairwise comparison comparing the 10 accuracy of 5 techniques pairwise as shown below. The graphic above was yielded after the following R commands: data <-…
mad
  • 2,677
  • 8
  • 35
  • 78
0
votes
3 answers

Choice of statistical test (in R) of two apparently different distributions

I have the following list of data each has 10 samples. The values indicate binding strength of a particular molecule. What I want so show is that 'x' is statistically different from 'y', 'z' and 'w'. Which it does if you look at X it has more…
neversaint
  • 60,904
  • 137
  • 310
  • 477
1 2 3
…
17
18