Identify the sampling techniques used, and discuss potential sources of bias (if

Question

Identify the sampling techniques used, and discuss potential sources of bias (if any). Explain. Alfalfa is planted on a 52-acre field. The field is divided into one-acre subplots. A sample is taken from each subplot to estimate the harvest. What type of sampling is used? Stratified sampling is used, since the field is divided into subplots and a random sample is taken from each subplot. Convenience sampling is used, since the alfalfa plants closest to the barn are sampled. Simple random sampling is used, since each sample of alfalfa plants of the same amount has the same chance of being selected. Cluster sampling is used, since the field is divided into subplots, a number of subplots are selected, and every alfalfa plant in the selected subplots is sampled. What potential sources of bias are present, if any? Select all that apply. The sample only consists of the alfalfa plants that are easiest to reach. This may not be representative of the entire population. It is possible that, due to sampling error, the sample will not be representative. Certain subplots may have more or fewer alfalfa plants than others. Samples from these subplots may bias the overall sample. There are no potential sources of bias.

Explanation / Answer

Here ,

we have to given that

alfalfa is planted for 52 acre field. the field is divided into one-acre subplots . and also take sample from each subplot for estimating the harvest.

(a)

Here , there are 52 strata and there is only one stratum and we take sample from that stratum .

So,

Here stratified sampling is used, since the field is divided into subplots and a random sample is taken from each subplot.

Option (A) is correct.

(b)

Here the sample only consist of alfalfa plants that are easiest to reach . This may not be representive of the entire population .

So, here Option (A) is correct.

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