Answer Happy

Which of the following provides a valid description of the correlation between two variables? When Janet saw that the correlation between a student's height and a student's score on a math test given to all students at Central Elementary School was 0.92, she said "Wow! That just proves that taller people are better at math!" Melissa is a mountaineer who has climbed some of the world's tallest mountains. On her last big climb, she recorded the altitude (height above sea level) and temperature at several different locations. She found the relationship to be roughly linear with a correlation close to -1. O Mary is a waitress at a popular restaurant. She recently complained that there is a very strong negative correlation between the number of orders she gets for buffalo chicken quesadillas on a given day and whether or not she sticks to her diet for that day. Arnold is a fitness trainer at a local gym. Recently, he did a study to investigate the relationship between an individual's body weight and how much they could leg press. He found that the relationship was roughly linear and the correlation was 2.0. On average, people could leg press twice their body weight.