Simple Random Sampling - Assignment Example

Non-Probability sampling techniques include Convenience, Judgment, Quota, and Snowball. Snowball sampling is a low-cost technique in which the researcher selects initial respondents by probability samples, and additional respondents are obtained by referral from initial respondents. This method is useful in surveying rare population members. In Quota sampling, the researcher classifies the population by distinct properties, determines the desired proportion of sample from each class, and fixes quota for each interviewer. Answer 4. Mutually exclusive implies that the set of variables do not overlap with each other.

This implies that only one dimension of the issue should be related to a particular variable. At the same time, the list of alternatives shall be collectively exhaustive. This implies that the alternatives should cover all the possible options that might be the answer to the question. A fixed alternative question shall have alternatives that satisfy the criteria of being mutually exclusive, as well as collectively exhaustive. 2. How often do you eat in the cafeteria? This is an open-ended question.

The question is not clear in terms of the units of frequency in which it wants the answer i.e. is it asking for weekly or monthly frequency. A more appropriate question might look like: This is an out-of-context question. The question preceding this, as well as the question succeeding this, is nowhere related to it. It is also not placed in the proper order. If it is necessary to include this question for some analysis, then it should come in the beginning part of the questionnaire, after the age question. 4. A recent analysis by a nutritionist from the Department of Health concluded that the food served in the cafeteria is some of the healthiest.