● When is the chi-squared statistic used in testing hypotheses?

 

●             When is the chi-squared statistic used in testing hypotheses? Include underlying assumptions and the test statistic for testing hypotheses on a single population variance.

●             What is a correlation coefficient? What is the range of its possible values, and why?

●             How do you determine if a correlation coefficient is statistically significant?

●             In a simple regression, what is the coefficient of determination, and how is it interpreted?