[Maths Class Notes] on Experiment Design Pdf for Exam

The experiment design, also referred to as the design of experiment, is a division of the applied statistics which oversees conducting, planning, analysing as well as explaining the controlled tests for estimating factors that control the parameter value of the group of parameters. The experiment design is an analysis tool of influential collections that can be utilised in various experimental situations. 

The experiment design enables the entry of various factors for manipulation to identify their impact on desired response or output. Through the management of various input or entries at the same time, the experiment design determines necessary interactions that could be missed when you are experimenting with one factor at a time. You can examine only the portion of the possible combinations called fractional factorial or all possible combinations called the full factorial.

In Statistics, experiment design can be defined as the design of a research experiment where you determine if a variable exists or not. This research experiment must be analysed under complete regulation and authority of the researcher. Fundamentally the design experiment is used in controlled experiments. These experiments tend to diminish the impact of variables for enhancing the reliability of the outcomes. The experimental unit used in experiment design might involve plants, animals, or a group of people.

The Examples of Experiment Research Design

There are various examples of experimental research design. The example relies on experimental research design types that have been considered. One of the important examples of experimental research design is the lab experiments that might differ in their nature based on the topic of research.

Other examples of experimental research design are Evaluation of exams at the end of the semester, evaluation of the skills of employees in a company or an organization, and evaluation of the different teachers’ teaching methods by schools.

The Various Types of the Experiment Research Design

Some of the different variations of the experimental research design include Quasi-experimental research design, True-experimental research design, and Pre-experimental research design.

The Quasi-experimental design refers to the partial design and it is similar to true experimental design with few differences.  The quasi-experimental design is commonly used in education research where administrators have to permit random selection of the students for the purpose of experimental samples. Some of this experimental design includes time series, counterbalanced design, and no equivalent control group design.

The true-experimental research design is the ideal form for experimental research design since it is based on statistical hypotheses for proving or disproving the hypothesis. This method is mainly used in physical science. Some of the vital factors that need to be satisfied in this method include random variables, easily managed variables by researchers, control groups, and experimental groups.

The Pre-experimental design uses the simplest method for research design in statistics. This method involves single or multiple groups that are put under observation after some specific factors are identified as cause and effect. This method is primarily used for understanding if further investigations are needed for a targeted group.