The survey has bias. (a) Determine the type of bias. (b)...

The survey has bias. (a) Determine the type of bias. (b) Suggest a remedy.
A retail store manager wants to conduct a study regarding the shopping habits of his customers. He selects the first 60 customers who enter his store on a Saturday morning.

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Key Concepts

Sampling Bias

Sampling bias occurs when the method of collecting samples favors certain members of the population over others, leading to a sample that is not representative. In this case, surveying only the first 60 customers on a Saturday morning may not capture the full diversity of customer habits at different times or days.

Convenience Sampling

Convenience sampling is a type of non-probability sampling where the sample is taken from a group that is easy to access. This method can introduce bias, as the sample may not be representative of the entire population. The example illustrates this by selecting customers simply based on their arrival time, which might not reflect shopping habits across all customers.

Random Sampling

The remedy for this type of bias is to use random sampling. Random sampling involves giving every member of the population an equal chance of being selected, which increases the likelihood that the sample will be representative of the overall population. Adjusting the sampling method to include different times and days would help mitigate the inherent bias in the described survey.

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