Explain the difference between the null hypothesis and alternative hypothesis. A.There is no difference, both are the same B.Null hypothesis is what is tested, but alternative hypothesis is what is accepted if the null is rejected C.The mean of the null hypothesis is larger than the the mean of the alternative hypothesis D.The alternative hypothesis is more progressive We can determine to use a lower onetailed test of hypothesis if the sign of the alternative hypothesis is less than <. True False The purpose of the chisquare test is: A.Test the variation in the sample B.To determine the numerical value of the relationship between two nominal (categorical) variables C.To test the hypothesis using non-parametric testing D.All the above Explain the difference between simple and multiple linear regression. A.Simple linear regression is faster B.The difference is in how many independent variables used in the regression model C.There is no difference D.There is a difference in the linearity Explain what is the coefficient of determination, R^2 (R-squared). A.It is a numeric value that indicates how much of the variation in the response variable can be explained by the change in the independent variable(s) B.It is how the outcome of correlation is determined C.This coefficient is used to determine if we need to test the hypothesis D.It determines the samples size