WGU C784-Statistics Practice Questions with 100% Correct Answers.

When one variable causes change in another, we call the first variable the ___________________ variable*. The affected variable is called the _______________ variable*. Correct Answer When one variable causes change in another, we call the first variable the explanatory variable*. The affected variable is called the response variable*. In a randomized experiment, the researcher manipulates values of the explanatory variable and measures the resulting changes in the response variable. The different values of the explanatory variable are called treatments. An experimental unit is a single object or individual to be measured. A two-way table, also known as a two-way frequency table or contingency table, is used to show the relationship between two ______________________variables ( C→C ); the rows show the categories of one variable, and the columns show the categories of the other variable. Correct Answer categorical variables ( C→C ) ______________________. These represent the total number of instances that fall in both the corresponding row and header. The data in the green cells show _______________________________. These are equal to the sum of the number of individuals in the corresponding row or column. Correct Answer The cells in yellow show joint frequencies*. These represent the total number of instances that fall in both the corresponding row and header. For example, data in the "Male" row and "With Autism" column counts the number of males with autism. The data in the green cells show marginal frequencies*. These are equal to the sum of the number of individuals in the corresponding row or column. For example, data in the "Totals" column and "Female" row shows the total number of females in the study. It may be helpful to remember that marginal frequencies appear in the margins of the table. The bottom, right cell (in both the "Totals" column and the "Totals" row) measures the total number of individuals in the study.