According to a newspaper article, "the stronger an onion tastes, the more likely it is to help fight cancer and other diseases, scientists at Cornell have found."44 For one of these study designs, it would be appropriate to summarize results with a correlation; which is it? For the other designs, tell why correlation would not be appropriate.
a. For various types of onions, record whether or not they have a strong taste, and record whether or not they contain cancer-fighting compounds called phenolics and flavonoids.
b. For various types of onions, record whether or not they have a strong taste, and measure amounts of cancer-fighting compounds called phenolics and flavonoids.
c. For various types of onions, rank them according to how strong they taste, and record whether or not they contain cancer-fighting compounds called phenolics and flavonoids.
d. For various types of onions, rank them according to how strong they taste, and measure amounts of cancer-fighting compounds called phenolics and flavonoids. Exploring the Big Picture: Two Quantitative Variable