Assignment 7 - Lesson 7 - Scatterplots

# Assignment 7 - Lesson 7 - Scatterplots - an association...

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Assignment 7 Lesson 7 – Scatterplots Problem 1. TR9-58-26: Bear Neck/Weight Consider the relationship between the size of a bear's neck and the bear's weight. Use the distances around bear necks for the horizontal scale and use the bear weights for the vertical scale. Based on the result, what is the relationship between a bear's neck size and its weight? Why might this be the better choice of which variable to plot on the x and which on the y-axes? Problem 2. RMW-102-4: Fast Food Sandwiches Download the file posted on the blackboard. The Fast Food Sandwiches datafile lists some nutritional information about sandwiches offered by Arby's fast food chain. Serving sizes are in ounces. 1. Create scatterplot of calories vs. serving ounces, using different colors for the three types of meat (roast beef, chicken, turkey). 2. Disregarding for the moment the distinction between the types of meat, does the scatterplot reveal
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Unformatted text preview: an association between a sandwich's serving size and its calories? Explain. 3. Now comment on tendencies you might observe with regard to the type of meat. Does one type of meat tend to have more or fewer calories than other types of similar serving size? Elaborate. Problem 3. MRA-80-2: Speed vs. Fuel Consumption Download the file posted on the blackboard. How does the fuel consumption of a car change as its speed increases? Here are data for a British Ford Escort. Speed is measured in kilometers per hour, and fuel consumption is measured in liters of gasoline used per 100 kilometers traveled. 1. Make a scatterplot. (Which variable should go on the x axis?) 2. Describe the form of the relationship. Why is it not linear? 3. Is the relationship reasonably strong or quite weak? Explain your answer. 1...
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## This note was uploaded on 06/09/2011 for the course STAT 113 taught by Professor Thaler during the Spring '11 term at CUNY Hunter.

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