This paper will state the special means of data collections in a questionnaire and an interview in criminal law. A questionnaire is a list of a research questions asked to defendants and designed. An interview is an authorized convening in which sequences of questions are inquired to determine appropriateness and find out data. One of advantages of a questionnaire is that, an open questionnaire gives a researcher a wide range of information to choose from the questionnaire.

Questionnaires also have some disadvantages

One of the disadvantages is that, the information collected is not always true. This comes since the person answering the question may be tempted to say what he feels the person asking the question want to know leaving behind some important data. Also, use of questionnaires is tiresome since the researcher has to go through the entire the answers in the questionnaires, and compare all the answers to extract the information he needs (Britt, 2011).

Interview has an advantage in that one is able to assess the interviewee when asking questions. From an interview, one gets a chance of differentiating and correcting the important data leaving behind which is not necessary. However, it also has some disadvantages. One of the disadvantages is that it is expensive and time wasting. This is because; one has to travel over long distances so as to conduct an interview (Britt, 2011). They are some necessary aspects that should be considered when handling review study.

They include Unbiased Samples when examining people. Examiners should make sure that they do not use an inspired sample. Another aspect is use of free Variables when handling new research.

Researchers should make sure that there are no variables that slant the results of the research.

The main advantage of field research is that the observation that the field researcher make is the basis of the data that will be used later on in the analysis. For this reason, the observation should be complete, and the filed observe should be as comprehensive as possible (Britt, 2011).

The power of field research is that examiners are carried out in the real world environs, which make it simple in carrying out the process. The process is also adaptable and cheap. The weakness of field research is that it requires a lot of skill, and it is a useful method hence the reviewer develops evidence from the observation.

A sample project is a context on the basis of selection of a review sample. A sample project ensures that evidence obtained help in solving the problem. The probability sampling is a project where the samples are collected and individuals in the population acquire equal chances of being selected. Types of probability sampling project are systematic sample in this project the chosen elements are kept in a record. Stratified Sample is another project used in sampling.

This is a project in which the researcher allocates the population into different groups then randomly selects the final topics. In addition, Cluster sampling system is used when it is hard to assemble a list of elements that make up the marked population. In non-probability sampling, the elements are assembled in a process where they are not equally selected. Types of this non-probability of sampling technique are the purposive sample where a sample is collected centered on the aim of the study.

Quota sample is another classification of non-probability sampling technique. This type is used whereby units are selected based on characteristic.

Sampling research system is classified into random and stratified sampling. In random sampling, the components have even chances of being selected. The advantage of this system is that it can be used with large sample population. The demerits are that it can lead to poor illustration when the samples are many. In addition, the technique may be hard in practical researches in terms of time availability.

Systematic sampling is another technique used in the process of research. The samples are evenly distributed in a three dimensional perspective. The advantage of this technique is that it is simple than other sampling method, and it results to a good analysis of the study. The disadvantage of systematic sampling is that the method is more unfair as not all samples are equally selected.

Some of the questions that the researcher would be asked in regard to the research are:

  1. What is the research question? What is happening and why is it happening?
  2. What types of data collections and data analysts to use in research?
  3. What sampling techniques to use in conducting the research?
  4. What is the size of samples required?

Secondary data analysis is the use of data that are collected for some purpose. The data may not be planned for work but it is used in analyzing other purposes.

In the assessment evaluation of the secondary data, the result are measured and hypothesized. The characteristics of the samples are classified, and the ability to collect the data is assessed. Some of the questions used in availability assessment are (Britt, 2011):

  1. What are the goals of the company?
  2. What is the mission of the company?
  3. What are the achievements made?

When conducting feasibility on racial profiling some of these questions may be used:

  1. What is skin color?
  2. What is the race of the person?

In conclusion, there are different types of agency records such as agency of crime. This agency accumulates details through the secondary process and analyses data from the previous section. In the census record agency, the researcher gathers data through secondary process and analyses it in documents for comparison.


Britt, R., (2011). Statistics Reporting Systems and Methods Unofficial Crime Statistics Net Industries and Licensors