Treatments are administered to experimental units by 'level', where level implies amount or magnitude. For example, if the experimental units were given 5mg, 10mg, 15mg of a medication, those amounts would be three levels of the treatment.
What is a factor level and treatment?
Factor: a categorical explanatory variable. • Levels: values of a factor. • Treatment: a particular combination of values for the factors.
What is treatment structure in experimental design?
Treatment Structure. The set of treatments or treatment combinations that the investigator has selected to study and/or compare. Design Structure. The grouping of experimental units into homogenous groups; often referred to as the blocking criterion.
How do you do an experimental treatment?
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.