Practical Research 2

This refers to the entire units or group of individuals that a researcher is interested to conduct his/her study.

• Population

• Sample

• Sampling frame

• Sampling technique

It might be difficult to study every unit of the entire group of individuals. Thus, a researcher frequently selects a representative subset of that entire group. This subset is called _____

• Population

• Sample

• Sampling frame

• Sampling technique

A safety inspector conducts air quality tests on randomly selected group of 10 classrooms of one of the biggest public high school in Davao City. Identify the population and sample in this setting.

• The population is all classrooms in the cluster; the sample is the 10 classrooms tested.

• The population is all classrooms in the said public high school ; the sample is the 10 classrooms tested.

• The population is all high school students in Davao City; the sample is the 10 classrooms tested.

• The population is all high school students in Davao City; the sample is the 10 high school students in the schools selected.

Which of the following shows a random sampling procedure?

• Jeff, directly get the names of his classmates as respondents of his study.

• Liza, asked her classmates to raise their hands who wants to be part as respondents of her study.

• Jessica, wrote the names of her classmates, and decided to get those who are in the first thirty (30) in the list.

• Alfred, ask his classmates to write their names on a sheet of paper, then put all of those in a box, and pick one by one from the box until it reaches the desired sample.

This is a scientific way of selecting respondents which can be part of the samples of the study.

• Sampling

• Non-Probability sampling

• Probability sampling

• Sampling frame

It refers to the degree to which an instrument accurately measures what it intends to measure.

It involves an analysis of whether the instrument is using a valid scale.

This kind of validity is determined by studying the questions to see whether they are able to elicit the necessary information.

It refers to the consistency of the results of an instrument in repeated trials.

The act of interfering to modify a process or situation is generally called as intervention ( Sundell & Olsson, 2017).