QNT 275 FINAL EXAM NEW 2016 VERSION/QNT 275 FINAL EXAM NEW 2016 VERSION

1. What is the name of the variable that’s used to predict another variable? 

​Explanatory

​Standard error of the estimate

​Response

​Coefficient of determination
​2. Professors at a local university earn an average salary of $80000 with a standard deviation of $6000. The salary distribution is approximately bell-shaped. What can be said about the percentage of salaries that are at least $74,000? 

​About 97.5 percent

​About 84 percent

​About 68 percent

​About 95 percent

3. What type of relationship is indicated in the scatterplot? 

​A positive linear or curvilinear relationship

​No relationship

​A negative curvilinear relationship

​A negative linear relationship

4. The study of statistics can be defined as:

​the art and science of getting information from data.

​All of the answers

​the language of data.

​the study of collecting, analyzing, presenting, and interpreting data.

​5. In the accompanying stem-and-leaf diagram the values in the stem and leaf portions represent 10s and 1s digits, respectively. The stem-and-leaf diagram shows that the distribution is ___________. 

​​symmetric

​positively skewed

​negatively skewed

​None of the answers