Some studies expose an experimental group to a treatment and measure its effects. Such an experimental design is the weakest of all designs, and it…

Probability And Nonprobability Sampling There are two major types of sampling designs: probability and nonprobability sampling. In probability sampling, the elements in the population have…

THE SAMPLING PROCESS Step 1: Define the Population A population must be defined in terms of elements, sampling units, extent and time. IN relation to…

Under what kind of conditions would you recommend. i) A probability sample? A non probability sample? ii) A simple random sample? A clusser sample? A…

Representativeness of Samples The need for choosing the right sample for a research investigation cannot be overemphasized. We know that a sample will rarely be…

What can we measure about the four objects listed below: Laundry Detergent Employees Job Satisfaction Factory Output Ans. Laundry Detergent: (1) What is the perception…

Measurement Error Measurement error is caused by difference between the information desired by the researcher and the information provided by the measurement process. Experimental Error…

A number of errors tend to influence a measurement. Thus, the general situation is: M=C + E, where E= errors. The smaller E is the…

Test-Retest Reliability Test-retest reliability estimates are obtained by repeating the measurement using the same instrument under as nearly equivalent conditions as possible. The results of…

Content Validity Content validity estimates are essentially systematic, but subjective, evaluations of the appropriateness of the measuring instrument for the task at hand. The term…