The Owner of a Local Nightclub Has Recently Surveyed a Random

question 30

Multiple Choice

The owner of a local nightclub has recently surveyed a random sample of n = 250 customers of the club. She would now like to determine whether or not the mean age of her customers is over 30. If so, she plans to alter the entertainment to appeal to an older crowd. If not, no entertainment changes will be made. Suppose she found that the sample mean was 30.45 years and the sample standard deviation was 5 years. If she wants to be 99% confident in her decision, what conclusion can she make?

• A) There is not sufficient evidence that the mean age of her customers is over 30.
• B) There is sufficient evidence that the mean age of her customers is not over 30.
• C) There is not sufficient evidence that the mean age of her customers is not over 30.
• D) There is sufficient evidence that the mean age of her customers is over 30.

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Definitions:

Coke and Pepsi

Refers to a classic example of duopoly in economics, representing competition between two dominant firms in a market.

Perfect Complementarity

Refers to a situation in consumer choice theory where two goods are always consumed together in fixed proportions because one is perfectly complementary to the other.

Engel Curve

A graph showing the relationship between the income of a consumer and the amount of a good that the consumer buys, illustrating how spending on a good varies with income.

Left and Right Shoes

Items that are perfect complements in consumption, where the use of one without the other is generally considered incomplete or unsatisfactory.