Sta2023 Quiz 4 7 Correctly Answered Questions Latest Update

A high positive correlation is found between college students' age and their GPA. However, if one student aged 44 with a high GPA is omitted from the study, the correlation all but disappears. This is an example of: {Ans: influential outlier}The cost of tuition is a very important topic. The Alligator surveyed 500 randomly selected students and asked them if they supported a 5% tuition increase. What kind of study is this? {Ans: Survey}Suppose that you recorded the number of television sets per person and the average life expectancy for the world's nations. There is a high positive correlation: nations with many TV sets have higher life expectancies. {Ans: The response variable is: the nation's life expectancy, in years The explanatory variable is: the number of TV sets per person The experimental units are: the nations The lurking variable that acts as a confounding factor in this study is: the nations' wealth}A survey asks participants if they support or oppose the building of new football stadium. If there are 80 respondents (selecting using a simple random sampling method) to a survey, what is the approximate margin of error? {Ans: 0.1118}At UF, there are always a few