Linked Questions
18 questions linked to/from Is chi-squared always a one-sided test?
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Chi-Square-Test: Why is the chi-squared test a one-tailed test? [duplicate]
In my Masters thesis I conducted an experiment in that subjects should decide between two alternatives. I had a control and a treatment group. The hypothesis was that in the treatment group more ...
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what type of hypotheses does "goodness of fit" signifies , i.e is it single tailed or two tailed? [duplicate]
Suppose it is required to test the fitting of binomial distribution to the following data ( at level $\alpha =0.05$) :
the parameter p is estimated as p = 0.494 , and the expected frequencies (given ...
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Why is there only one critical value in the Wald confidence interval [duplicate]
Im currently studying the Wald test statistic for testing $ H_0: \boldsymbol{R'\hat{\beta}} = \boldsymbol{r} $ given by
$$
W = \frac{(\boldsymbol{R'\hat{\beta}} - \boldsymbol{r})'(\boldsymbol{R'(X'X)R)...
48
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Fake uniform random numbers: More evenly distributed than true uniform data
I'm looking for a way to generate random numbers that appear to be uniform distributed -- and every test will show them to be uniform -- except that they are more evenly distributed than true uniform ...
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R: calculate p-value given Chi Squared and Degrees of Freedom
How can I calculate the p-value given Chi Squared and the Degrees of Freedom?
For example, what would be the exact p-value of a Chi Squared = 15 with df = 2?
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Interpretation of Little's MCAR test
My Little's MCAR (missing completely at random) test on 74 items and 151 cases revealed
chi-square = 27.120, DF = 1974, and sig. = 1.000.
Can I conclude that ...
17
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1
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Which test for cross table analysis: Boschloo or Barnard?
I am analyzing a 2x2 table from a small dataset of 30 patients. We are retrospectively trying to find some variables that give a hint about which treatment to choose. The variables (obs normal / ...
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$\chi^2$ tabulated value
I noticed that the critical $\chi^2$ value increases as the degrees of freedom increase in a $\chi^2$ table. Why is that?
6
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What is the meaning of a large p-value?
I understand that the $p$-value is the conditional probability of observing the test statistic or something more extreme given that the null hypothesis is true. I have read the great explanation by @...
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Chi-squared distribution for dice not returning expected values?
I'm trying to verify that my dice are reasonably fair and balanced. I'm not sure I'm doing it right, though, since I'm basically teaching myself stats without references. To achieve this, I've settled ...
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How to define a Rejection Region when there's no UMP?
Consider the linear regression model
$\mathbf{y}=\mathbf{X\beta}+\mathbf{u}$,
$\mathbf{u}\sim N(\mathbf{0},\sigma^2\mathbf{I})$,
$E(\mathbf{u}\mid\mathbf{X})=\mathbf{0}$.
Let $H_0: \sigma_0^2=\...
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1
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One-sided McNemar's test
In R, the function mcnemar.test has the following example:
...
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Chi-square test p-value = 1
I am attempting to use the chi-square test as a goodness-of-fitness test in R, but I keep getting a p-value = 1. I expect a high p-value, but less than one. Can anyone point out what error I might be ...
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What is null hypothesis in the deviance goodness of fit test for a GLM model?
To test the goodness of fit of a GLM model, we use the Deviance goodness of fit test (to compare the model with the saturated model).
In many resource, they state that the null hypothesis is that &...
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Chi-Square test: one-sided implementation?
I need to compare two samples and I would like to know if the distribution of the first stochastically dominates that of the second one.
I'm not sure whether with the Chi-Square test I can verify ...