Prices and protein revisited Is there a relationship between the protein content and the cost of Subway sandwiches? Use software to analyze the data in the following table

a. Construct a scatterplot to show how protein depends on cost. Is the association positive or negative? Do you notice any unusual observations?

b. What might explain the gap observed in the scatterplot?
(Hint: Are vegetables generally high or low in protein relative to meat and poultry products?)

c. Obtain the correlation between cost and protein, r.
Interpret this value in context.

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Sandwich BLT Cost ($) Protein (g) Ham (Black Forest, without cheese) $2.99 $2.99 17 18 Oven Roasted Chicken $3.49 23 Roast Beef $3.69 26 Subway Club $3.89 26 Sweet Onion Chicken Teriyaki $3.89 26