To help travelers know what to expect, researchers collected the prices of commo

Question

To help travelers know what to expect, researchers collected the prices of commodities in 16 cities throughout the world. Here are boxplots comparing the average prices of a bottle of water, a dozen eggs, and a cappuccino in the 16 cities (prices are all in US$). Use these boxplots to complete parts a and b below.

1.) In general, which commodity is the most expensive?

A.On average, eggs are the most expensive of the three. The third quartile of egg prices is roughly equal to the third quartile of cappuccino prices, but the middle 50% of egg prices is much more variable.

B.On average, a cappuccino is the most expensive of the three. The maximum cappuccino price is higher than any of the other prices.

C.On average, eggs are the most expensive of the three. The first quartile of egg prices is higher than most of the water prices. The third quartile for egg prices is higher than most of cappuccino prices.

D.On average, a cappuccino is the most expensive of the three. The first quartile of cappuccino prices is higher than all the water prices. The middle 50% of cappuccino prices is less variable than egg prices, and the top 25% is higher.

Explanation / Answer

On average, a cappuccino is the most expensive of the three. The first quartile of cappuccino prices is higher than all the water prices. The middle 50% of cappuccino prices is less variable than egg prices, and the top 25% is higher.

Option D is correct.

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