Sampling Questions Research Paper Example | Topics and Well Written Essays - 500 words

Sampling Questions - Research Paper Example Confidence interval with its reliability around the population measures the sampling error and ensures that it provides confidence of the samples by around 95% hence making the samples more reliable. It therefore tries to reduce the sampling error. The relationship between the two is based on inverse square root. This means that as the sample size increases the confidence intervals increases by squares. This relationship is so because an increase in sample size means a reduction in sampling error and a more reliable representation of the population that will be known and hence the reduction in the confidence interval. Probability sampling is a sampling technique where all the elements in the population have an equal chance of being included as samples. This method therefore reduces bias and it is fair. It is effective where large samples are required and time is not of the essence. The disadvantage is that it is a costly process, requires higher level of expertise and resources like time (Cozby, Paul and Bates, 146). Non-probability sampling is a technique where there is no guarantee of an equal chance of the elements in the population being included in the study. This is because the samples are chosen according to their convenience to the researcher and not randomly. The advantage of this technique is that it is time saving, very effective when the samples required are few and it is also more flexible. The lack of randomness introduces the disadvantages of bias, lack of reliability and also generalizability of the results. Response rates in surveys are sometimes lower than expected. In order to reduce this tendency it is important for the researcher to assure the respondents of the confidentiality of their responses, provide them with a bit of background information about the research hence making them informed, keep the