What is a designed experiment?A. A designed experiment is a list of all individuals in a population along with certain characteristics of each individual. B. A designed experiment is when a researcher assigns individuals to a certain group, intentionally changing the value of an explanatory variable, and then recording the value of the response variable for each group. C. A designed experiment measures the value of the response variable without attempting to influence the value of either the response or explanatory variables.

B. A designed experiment is when a researcher assigns individuals to a certain group, intentionally changing the value of an explanatory variable, and then recording the value of the response variable for each group.

Step-by-step explanation: An experiment is a term used to describe the various procedures or steps put in place or carried out in order to either validate,refute, or support a hypothesis.

A designed experiment is a type of experiment, when the individual conducting the experiment intentionally change certain variables or factors in order to observe or confirm how it affects the other variables or factors.

14

step-by-step explanation:

14 x 3 = 42