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Answer to Question #1105 in Statistics and Probability for abby

Question #1105
Describe a situation where you would need each of the following tests: Multiple Regression, t-test for Related Samples, Correlational Analysis, and the z-test. Give one example for each test.

Expert's answer
Multiple Regression : when we have to predict the value from several measured independent variables.
t-test for Related Samples : when we have to compare to paired groups, to check their means or sta;
Correlational Analysis : when we have to check if there some relationships between two or more observed veriables are exist.
the z-test: if we have to check the null hypothesis in the sample with a huge number of observations ( or we know the standard deviation of the population.

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