Concept explainers
To find how many students at a middle school bring their lunch from home and to check whether the sample is biased, unbiased and describe its type.
Answer to Problem 1CYU
As to determine the number of students who bring their lunch from home all the students on one school bus are surveyed. The sample is unbiased as all the students on one single bus are surveyed.
Explanation of Solution
Given:
All the students on the one school bus are surveyed to determine the number of students who bring lunch from home.
Bias of an estimator is basically the difference between the estimator’s expected value and the original value of the parameter which is calculated.
The estimator which has a zero bias is called as unbiased. It is a random selection.
Conclusion:
Hence, as to determine the number of students who bring their lunch from home all the students on one school bus are surveyed. The sample is unbiased as all the students on one single bus are surveyed
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