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Chapter 12: Q4. (page 797)
Evaluate each expression.
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Identify each sample as biased or unbiased. Explain your reasoning.
The local library asks everyone who checks out a book if they also used the computers at the library.
To ensure that all of the chocolate bars are the appropriate weight, every 50th bar on the conveyor belt in the candy factory is removed and weighed. Is the sample simple, stratified, or systematic.
Identify the sample, and suggest a population from which it was selected. Then classify the sample as simple, stratified, or systematic. Explain your reasoning.
A nostalgia television network wants to conduct a cartoon marathon. To choose the episodes, they mail a questionnaire to people selected at random throughout the country.
Identify each sample as biased or unbiased. Explain your reasoning.
Every fifteenth shopper at a clothing store is asked what they would want most for their birthday.
Find the mean, variance, and standard deviation to the nearest tenth for the set of data.
3, 5, 6, 2, 1, 5
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