The manager of a popular restaurant wants to know what types of vegetarian dishes people prefer to eat. Which sample would provide the most accurate data?

A random group is less likely to be biased than friends, people leaving a hamburger stand, or a very small group. A random group of 40 people on the street is also larger than the group of 5 at the grocery store, so it is more likely to represent a range of preferences. Therefore, the random group of 40 people is the best sample.

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