What is the name of the variable that’s used to predict another variable?
Explanation: An explanatory variable, sometimes called a predictor, is a special type of independent variable that is used to measure another variable. An example of this an action is a study about the effectiveness of a body building supplement. The explanatory variable would be the dosage of the supplement, while the response variable would be the change in muscle growth.
Salary Distribution of Professors
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 84 percent
Explanation: A bell shaped curve is an example of a normal distribution that can be broken down into a set of percentages. In this example, we total all values that are about -1 deviation from the center of the curve, which results in approximately 84% of the total teacher salaries in this example.
What type of relationship is indicated in the scatterplot?
Use the following the steps below to quickly determine any scatterplot relationship.
- If the points cluster from lower left to upper right – positive correlation.
- If the points cluster from upper left to lower right – negative correlation.
- If the points cluster in a straight line – linear.
- If the points cluster in a curved non-straight line – curvilinear.
- If there is no clustering – no relationship.
The study of statistics can be defined as:
the art and science of getting information from data.
the language of data.
the study of collecting, analyzing, presenting, and interpreting data.
- Student: Regina Austin
- Textbook: Statistical Techniques in Business
- Course: QNT/275
Statistics is Hard! Check out the Entire QNT 275 Study Sheet