A population of flights can be classified according to two factors: duration (short, medium, or long) and purpose (vacation or business). We are interested in whether either of these factors has an effect on price. The table below gives mean prices for a balanced population. The average cost of a business flight is:
A)$400.
B)$2600.
C)$650.
D)$866.67.

Question

A population of flights can be classified according to two factors: duration (short, medium, or long) and purpose (vacation or business). We are interested in whether either of these factors has an effect on price. The table below gives mean prices for a balanced population.  The average cost of a business flight is:
A)$400. 
B)$2600. 
C)$650. 
D)$866.67.

Quizplus · Accepted Answer

To calculate the average cost of a business flight, we need to take the average of the three prices for business flights, which are $800, $2000, and $1200. (800 + 2000 + 1200) / 3 = $1000. Therefore, the correct answer is D, $866.67 being the closest option.

A Population of Flights Can Be Classified According to Two