Concept explainers
Identify following case whether biased or unbiased: Surveying every 5th student in cafeteria for their pizza preference.
Answer to Problem 13.5MPS
Surveying every 5th student in cafeteria for their pizza preference isan example of systematic random type unbiased sample.
Explanation of Solution
Given:
Surveying every 5th student in cafeteria for their pizza preference.
Calculations:
Here, we have to justify whether given example is biased or unbiased.
Biased samples are the samples that are most likely to be considered than others in whole population.
Unbiased samples are the samples in which almost all members are included in the population
Given example is systematic random type unbiased sample as students are selected as per time interval.
In systematic sampling, all elements in a population are counted and every n th element is chosen for inspection.
Conclusion:
Therefore, we are able to define whether given sample is biased or unbiased.
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