Coursepack, p. 523 MAT 133: 4.1 WS 2 p.2 3. Which of the scatterplots below shows the following? (Each graph can only be used once) (1) r = 0.01 .. .. .. . (2) r = 1 (3) The strongest negative a b C correlation (4) Which graph would show the relationship between hours of playing video ... . games and grade in a course? (d) (e) (f) 4. A survey of the world's nations in 2010 shows a very strong positive correlation between the percentage of the country having broadband Internet access and life expectancy in years at birth. Explain why, even though there is a very strong positive correlation, that does NOT mean that broadband internet access is necessarily good for your health. (Circle the best choice) a) People can look up their symptoms on the Internet. By doing this, people can find out if they are sick, go to the doctor, get better and love longer. b) There are lurking variables that affect both life expectancy and Internet access such as the country's wealth, access to electricity, etc. c) There are lurking variables such as maybe some people are just healthy that use the Internet. d) There are lurking variables that affect life expectancy such as what they eat, how much they exercise, etc. e) Having Internet access won't help you live longer necessarily. Some people with the Internet die very young. f) There are lurking variables in the data such as technology is improving. The improved information from the Internet might be a good resource for doctors, making the medical information and choices they need to make more updated, etc