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Which of the following is an example of a random sampling?
The school newspaper asks teachers in that middle school how they feel about the behavior of twelve year old boys.

The manager of a restaurant asks customers their opinion on a new salad dressing.

A national survey company picks one phone number from each area code in America to call and ask for an opinion on current political issues.

Migrant workers are surveyed on their opinion of mandatory health insurance for companies.

Sagot :

ampritchard


I'm going to go with the following: A national survey company picks one phone number from each area code in America to call and ask for an opinion on current political issues.

The reason I went with this option is because in statistic terms people are chosen from a larger group making them a subset. The individuals are being chosen randomly but yet the individuals all have the same likelihood  of being chosen as anyone in the subset group.

Hopefully this helps and makes sense.

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