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This is used in statistic to know whether to accept or reject a null hypothesis or alternative hypothesis

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Q: What is test statistic?
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What is test statistic. Why do you have to know the distribution of a test statistic?

A test statistic is used to test whether a hypothesis that you have about the underlying distribution of your data is correct or not. The test statistic could be the mean, the variance, the maximum or anything else derived from the observed data. When you know the distribution of the test statistic (under the hypothesis that you want to test) you can find out how probable it was that your test statistic had the value it did have. If this probability is very small, then you reject the hypothesis. The test statistic should be chosen so that under one hypothesis it has one outcome and under the is a summary measure based on the data. It could be the mean, the maximum, the variance or any other statistic. You use a test statistic when you are testing between two hypothesis and the test statistic is one You might think of the test statistic as a single number that summarizes the sample data. Some common test statistics are z-score and t-scores.


What does the test statistic measure?

The test statistic is a measure of how close the sample proportion is to the null value.


What is the p value of a test statistic of 1.369?

The answer depends on what the test statistic is: a t-statistic, z-score, chi square of something else.


What is the difference between 2 sample z test statistic and 2 sample t test statistic?

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What is the conclusion if the test statistic is the same as the critical value?

Any decision based on the test statistic is marginal in such a case. It is important to remember that the test statistic is derived on the basis of the null hypothesis and does not make use of the distribution under the alternative hypothesis.


What is the difference between estimate and statistic?

statistic is a test used to test a hypothesis andestimation is finding the cost before it has been actually manufactured


What is the difference between statistic and an estimate?

statistic is a test used to test a hypothesis andestimation is finding the cost before it has been actually manufactured


How do you find p value with test statistic and critical value?

Normally you would find the critical value when given the p value and the test statistic.


What is the meaning of Sampling distribution of the test statistic?

Given any sample size there are many samples of that size that can be drawn from the population. In the population is N and the sample size in n, then there are NCn, but remember that the population can be infinite. A test statistic is a value that is calculated from only the observations in a sample (no unknown parameters are estimated). The value of the test statistic will change from sample to sample. The sampling distribution of a test statistic is the probability distribution function for all the values that the test statistic can take across all possible samples.


Does standard deviation effect the alpha level?

Yes.For some tests, such as the Fisher F-test, the test statistic is an estimate of the variance. If the alpha level was not affected, the test would be no use at all!Yes.For some tests, such as the Fisher F-test, the test statistic is an estimate of the variance. If the alpha level was not affected, the test would be no use at all!Yes.For some tests, such as the Fisher F-test, the test statistic is an estimate of the variance. If the alpha level was not affected, the test would be no use at all!Yes.For some tests, such as the Fisher F-test, the test statistic is an estimate of the variance. If the alpha level was not affected, the test would be no use at all!


What is hypothesis in basic statistic?

A statistician may have some idea about some statistics in a data set, and there is a need to test whether or not that hypothesis is likely to be true. Data are collected and a test statistic is calculated. The value of this test statistic is used to determine the probability that the hypothesis is true.


Is Chi-square a test of association?

The Chi-squared statistic can be used to test for association.