Solved by a verified expert:Topic 6DQ 1As a health care professional in public health, compare when you would use hypothesis testingand when you would use regression..Topic 6 DQ 2If a regression line (linear regression line) is said to "fit" the data presented in a scatter plot, whatrelation is minimized between the observed data, y, and the predicted output for the regressionline?Topic 7 DQ 1As a health care professional in public health, describe some examples that demonstrate theimportance of interaction of variables in a two-way analysis of variance.Topic 7 DQ 2 Explain why computing a variance of several numbers is like analyzing their differences.Topic 8 DQ 2Discuss the advantages of nonparametric tests.Topic 8 DQ 1Discuss the differences between parametric and nonparametric tests.