Question

what are the independent and dependent variables in this A quality control supervisor measures the quality of a steel ingot on a scale from 0 to 10. He designs an experiment in which three different temperatures (ranging from 1100 to 1200 F) and five different pressures (ranging from 500 to 600 psi) are utilized, with 20 ignots produced at each temperature-pressure combination.

Answer 1

Independent Variable : Temperature, Pressure

Dependent variable : Quality of steel ingot

independent variables, (factors), are variables whose values do not depend on the value of another variable; and dependent variables are variables whose values depend on the independent variables.

For the given problem, Temperature and pressure does not depend on another variable; hence ; Temperature and Pressure are independent variables;

Whereas; Quality of steel ingot whose values depend on the independent variables : Temperature and Pressure; Hence  Quality of steel ingot is dependent variable.

For the given design; Number of levels of Temperature are three and number of levels for pressure are five;