# Questions tagged [chi-squared-test]

A test (typically of distribution, independence, or goodness of fit), for the family of distributions use [chi-squared-distribution].

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### Bernoulli distribution; test p <= 0.3

I have a random variable $X \sim Ber(p)$ and I should test: $$H_0: p \leq 0.3$$ $$H_1: p > 0.3 - alternative$$ I tried to use $\chi^2$- test, but there is a problem: the number of degrees of ...
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### Statistical significance of 3 sample point [closed]

I have a data source with an accuracy of 69.3% (when compared with ground truth data). When a model is applied with 3 different parameters the resulting accuracies are 73.088, 74.912 and 72.89. How ...
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### Significance or P value for limited sample size

I have calculated accuracy gain for applying an algorithm. For six different parameters, six estimates (both gain and loss) were obtained. I need to do a statistical test to say the average estimate ...
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### Which test to use? looking for approval [closed]

I have a multiple categorized table. The columns are three+- categories which I want to compare (pairwise - 2 each time). For instance: ...
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### How to find the Chisq values for a two tailed test in R? [duplicate]

How do we find the chisq value for a two tailed test? For left tail we use qchisq(x,df,lower.tail="True") For right tail we use qchisq(x,df,lower.tail="False") What about two ...
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### Chi- square test or Mann Whitney test? [duplicate]

I have the following data: group A: very bad 12, bad 20, quite good 11, good 29, very good 14 group B: very bad 20, bad 10, quite good 6, good 11, very good 34 which test is appropriate for this kind ...
27 views

### Chisquare statistic not working python

code is Python 3 I have a dataset of 5000 counts that I need to plot, compare to a Gaussian fit, and calculate the Chisquare statistic. The code I have used to plot my data is: ...
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### The Degree of Freedom of the Pearson's X^2-test

everyone. The degree of freedom for a Person's X^2 test is (I-1)*(J-1) and it is obtained by (IJ-1) -([I-1]+[J-1]) =(I-1)(J-1). I am just wondering why it is (IJ-1) -([I-1]+[J-1])?? What is (IJ-1) ...