QUESTION 1

A ratio level variable has a Mean of 87, a Median of 80, Skew ＝ -0.43, Kurtosis ＝ +0.64, Shapiro-Wilk ＝ 0.07: is the variable normally distributed Y/N? Why? Be specific about each statistic. Slides 45, 117

QUESTION 2

If Levene’s Sig. ＝ .038, what type of t Test is it, be specific? Why? If the t Test Equal Variances Assumed P actual ＝ .021 and the Equal Variances Not Assumed P actual. ＝ .028, which one do you use? Is there an association at the 95% Confidence Level? Why? Slides 79, 88, 122, 123, 125, 126

QUESTION 3

A researcher gave a group a test. The mean was 92. The researcher compared this to the mean of the population which is 85. P actual was .026. What type of t test is this, be specific? Is there an association at the 95% Confidence level? Why? What is the difference in the means, amount and direction? Slides 79, 88, 122, 133, 134

QUESTION 4

A researcher wanted to determine if High School GPA (HSGPA) measured as a number to two decimal places is a good predictor of First Year College GPA (FYGPA) measured in the same way. Pearson Correlation was .55, P actual. ＝ .04. Is there an association at the 95% Confidence Level? Why? If yes, strength? Percent causation? Interpret? Slides 79, 146, 147, 148

QUESTION 5

A researcher wanted to develop a predictive model using regression analysis for the scenario in question 4. Pearson R ＝ .620, Constant ＝ 2.0, Slope ＝ .4. What is Pearson R strength? Percent causation? State the regression equation? Predict FYGPA for HSGPA ＝ 2.5? Slides 153, 154, 155

QUESTION 6

When do you use Analysis of Variance (ANOVA)? What are the types? How do you decide which one to use, be specific including the relevant statistic and its value? Why do you use the Bonferroni Post Hoc Test? How does it help? What statistic do you use to determine strength? Interpret .684? What is the percentage causation? Slides 136 to 143