Suppose a researcher is trying to predict the outcome of a local proposition req

Question

Suppose a researcher is trying to predict the outcome of a local proposition requiring equal pricing of services, such as dry cleaning. for men and women. Because women are traditionally charged more that men, women might be more likely to vote in favor of the proposition. Because there are more women voter in the population (600 women vs. 400 men), the researcher selected 60 women and 40 men at random in his sample. What type of sampling is being used? If the female population and male population arc the same in their opinion on this issue (i.e., no difference). would this sampling method still be preferable to a simple random sampling? why? Briefly describe the differences between probability and nonprobability sampling

Explanation / Answer

Answer to question# 1)

The population consists of males and females ,and since the question is related to equal pricing amongst males and females , the sample basically tries to represent the two segments of the population appropriately

In such a case we may consider that the population is originally heterogenous and by separating males and females, we end up forming homogenous stratas

Now the sample gives same weightage as in the population to the two stratas

Thus this is a particular case of "stratified sampling , where a heterogenous population is divided in to homogenous stratas, and then sampling units are selected from each strata to represent the population correctly and ultimately form a heterogenous sample"

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Even if the opinon of the two stratas is same reagrding the issue fo equal pricing it would be still suggested to use the same method of sampling: stratified sampling. The reason is : because the question is about equal pricing for males and females. It is the need of the claim to consider the population in two segments. Thus it is imporant to represent the segments correctly in the sample. After forming the sample the two stratas may or may not have same opinion, This does not affect the desing of the sample. This affects the outcome of the research.

Thus it is the need of the claim to chose the method of "startified sampling" to form the sample

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