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examples for population versus sample

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1) Determine whether the evaluated group is a population or a sample

a) Based on a randomly selected group of 500 patients with high cholesterol, it was found that 67% have heart disease. Is this a population or a sample; explain your answer.

b) An investigation of 150 randomly selected local restaurants concluded that 42% of local restaurants have serious health code violations. Is this a population or a sample; explain your answer.

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a. This is a sample because a population is a collection of data whose properties are ...

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