According to the Entertainment Software Association, the Average Age of "Gamers

question 1

Multiple Choice

According to the Entertainment Software Association, the average age of "gamers" (those that routinely play video games) is 30 years old. A random sample of 33 gamers people had an average age of 32.7 years old. Assume that the population standard deviation for the age of gamers is 4.6 years. Use a 90% confidence interval to test the validity of this report and choose the one statement that is correct.

• A)Because this confidence interval does not include 30 years, the report by the Entertainment Software Association is not validated.
• B)Because this confidence interval does include 30 years, the report by the Entertainment Software Association is not validated.
• C)Because this confidence interval does not include 30 years, the report by the Entertainment Software Association is validated.
• D)Because this confidence interval does include 30 years, the report by the Entertainment Software Association is validated.

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Definitions:

Total Cost

The total economic cost of production, including both fixed and variable costs.

Average Total Cost

Total cost divided by the number of units produced, representing the cost per unit of output.

Average Total Costs

The sum of all the production costs divided by the quantity of output produced, representing the per-unit cost of production.

Average Variable Costs

Costs that vary with the level of output, divided by the quantity of output produced, indicating the variable cost per unit.