1) A catalytic converter is an exhaust emission control device that reduces toxic gases and pollutants in exhaust gas from an internal combustion engine into less-toxic pollutants though a chemical reaction. The catalyst for this reaction is often a mix of precious metals. Platinum is the most widely used metal in the production of catalytic converters. Which statement is most true?

Group of answer choices

The cost of catalytic converters depends on the price of platinum.

The price of platinum depends on the cost of catalytic converters.

The cost of catalytic converters does not depend on the price of platinum.

The cost of catalytic converters is random and unknowable.

2)

Question 2 What is the below chart called? 7 6 Increase in Points on Exam 3 A 3 7 Hours Studying for Exam 3 O A scatter diagram O A bar chart O A pie chart O A histogramQuestion 3 Which answer applies to the relationship between X and Y? YV.X 0 Positive relation 0 Negative relation 0 Upper hemi-continuous O No relation Question 5 For Obs. 3, from the z-scores for the X variable and Y variable, what can we tell? (Assume a population.) TABLE 1 Obs. X 9 10 9 12 20 O The correlation coefficient is zero. O The X value is below its mean while the Y value is above its mean O The X value is above its mean while the Y value is below its mean O The X value is above its mean while the Y value is above its meanQuestion 7 For the scatterplot below, identify which correlation coefficient the plot represents. Yv. X 100 90 80 70 . 6 8 8 6 58 0 20 40 60 80 100 X O Near 1 O Near 0.5 O Near 0 O Near - 1Question 14 What is the mean of X? TABLE 2 Obs. X SUx SUy SUx*SUy Predicted SUy Predicted Y Error Error 2 autwNm Assume this is population data O 1.67 O 2.83 0 5.48 O -7.00