The dependent variable is also known as the criterion variable when the purpose is to determine the effect of the independent variable by pre-determination of the criterion to be reached.

For a nominal data, mode is the only measures of central tendency which can be used to describe that data.

The word null itself implies 'no'. So, null hypothesis indicates no relationship between two variables.

Methodological approach is used when the researcher is interested in developing a new research instrument or is attempting to test the validity or reliability of an already existing tool.

Phenomenology is a type of qualitative study which studies the lived in experiences of clients from the view of those who have experienced the phenomenon themselves.

Mean and standard deviation helps to describe the data and thus are the best measures of descriptive statistics.

Conceptual phase involves identification and conceptualization of the research problem and thus is the first phase of research process.

A true experiment.

Notice boards do not provide any information unless some information from other sources is pasted on them. Thus they can not be considered as the source of review of literature.

Since checklist helps to identify the stepwise performance of a procedure, this is the most appropriate tool to assess the psycho-motor domain.

These are beliefs and ideas which a researcher holds about the research which may or may not be true.

Randomized control trial is a true experimental study. Thus, its report is considered as primary research article.

This type of research design is interested in describing a phenomenon as it exists in nature. Since attitude is just being described as it occurs in the workers, descriptive design is the most suitable.

This type of research design is interested in a cause and effect relationship but the researcher can not manipulate the independent variable to see its effect on the dependent.variable.

This type of research will involve quantitative approach as the observer is not a part of the group and a structured way of observation will have to be used.