High blood pressure is unhealthy. Here are the results of one of the studies that link high blood pressure to death from cardiovascular disease. The researchers classified a group of white males aged 35 to 64 as having Low blood pressure or High, then followed the subjects for five years. The following two-way table gives the results of the study: 21 55 76 2655 3283 5938 2676 3338 6014 In this example, it would be appropriate to calculate: conditional row percentages conditional column percentages the correlation coefficient r the five-number summary of both variables none of the above Question 2 of 8Points: 10 A local ice cream shop kept track of the number of cans of cold soda it sold each day, and the temperature that day, for two months during the summer. The data are displayed in the scatterplot below: The one outlier corresponds to a day on which the refrigerator for the soda was broken. Which of the following is true? A reasonable value of the correlation coefficient r for these data is 1.2. If the temperature was measured in degrees Celsius (C = 5/9 * (F – 32)), the value of r would change accordingly. If the outlier was removed, r would get closer to 1. If the outlier was removed, r would get closer to 0. If the outlier was removed, r would get closer to -1. Question 3 of 8Points: 10 Suppose that the correlation r between two quantitative variables was found to be r = 0. This means that: There is no relationship between the two variables. There is no linear relationship between the two variables. There is a strong linear relationship between the two variables. There is a strong relationship between the two variables. None of the above. Question 4 of 8Points: 10 A correlation of r = .79 is found between the number of burglaries and the number of police employed by a city. Which of the following is true? Burglaries must be the cause of more police. There is a pretty strong positive linear relationship between number of burglaries and number of police. Population size of the city is a possible lurking variable that is “behind” this relationship. Both (B) and (C) are true. None of the above. Question 5 of 8Points: 10 The data in the scatterplot below represent the year the SAT was administered and the average math scores for all students who took the test that year. The o’s correspond to females and the +’s to males. Which of the following conclusions is most accurate? There is a positive correlation between gender and SAT math score, since men tend to score higher. There is a negative correlation between year and SAT math score for males and for females. There is a positive correlation between year and SAT math score for males and for females. Both (A) and (B) are correct. Both (A) and (C) are correct. Question 6 of 8Points: 10 What can we say about the relationship between the correlation r and the slope b of the least-squares line for the same set of data? r and b have the same sign (+ or -) both r and b always have values between -1 and 1 r is always larger than b the slope b is always equal to the square of the correlation r b is always larger than r Question 7 of 8Points: 10 A study was done on the mortality (live vs. die) of two major hospitals: CareBetter and TreatMore. Data were collected over a period of time from five major illnesses and it was found that CareBetter does better overall (i.e., has a smaller percentage of deaths). However, in each of the five illnesses separately, TreatMore does better. Which of the following is correct? This is an example of Simpson’s Paradox. “Illness” is a lurking variable in this example. Both (A) and (B) are correct. This is an example of a negative association between variables. This situation is mathematically impossible. Please answer the question below. Your response will not be graded, but it will be available for your instructor to read. Question 8 of 8Points: 0When faced with a data analysis problem that involves two variables, explain how you would decide which graphical display and numerical measures to use.