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What is diffrence between statistic and statistics?
statistic is singular and statistic is plural
What is a negative statistic?
a statistic that is not in youre favor
What fact is a statistic?
well i dont get the question but any fact is a statistic.
What it is the difference between statistic and statistics?
Statistic is singular; statistics is plural. Statistic is a single data point. Statistics is the study of collections of related data points.
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.
