A large store wanted to know if consumers would be willing to pay slightly higher prices to have computers available throughout the store to help them locate items. The store posted an interviewer at the door and told her to collect a sample of $100$ opinions by asking the next person who came in the door each time she had finished an interview.

The population of units is all store customers

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; the measurements are

the answers to the question posed

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$.$ Units in the sample are

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$,$ and the sample measurements are

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$.$