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Unformatted text preview: CHAPTER 4 ASSIGNMENT Q1) The fuel tank capacity in gallons and the cruising range is given for 6 SUVs. Capacity in gallons Cruising range in miles 22 445 21 405 23 410 24 420 24 365 a. Develop a scatter diagram for the data. b. How would you characterize the relationship between fuel tank capacity and cruising range? c. Estimate the cruising range in miles of a car having fuel tank capacity of 23 gallons d. what is the cruising range in miles of a car having fuel tank capacity of 23 gallons Q2) A study is conducted concerning automobile speeds and fuel consumption rates. The following data is collected: a. Plot these data in a scatter diagram. b . Compute the coefficient of correlation. Q3). A realtor wanted to determine if there was a relationship between the size (in 100 square feet) of a new custom-built home and the price (in thousands of dollars) of the home. Find the equation of the regression line and graph the line on a scatter plot. Size, x Price, y 26 235 27 273 41 387 29 253 33 295 34 335 36 395 45 475 22 203 a. Plot these data in a scatter diagram. b. Determine the coefficient of correlation. c. Determine the coefficient of determination. Comment on the strength of the association between the two variables. d. Determine the regression equation. e. Interpret the regression equation. Where does the equation cross the Y-axis? Q4). there is a believe that there is a relationship between the number of new cars sold and the number of sales people on duty. To investigate he selects a sample of eight weeks and determines the number of new cars sold and the number of sales people on duty for that week. Speed MPG 44 22 51 26 48 21 60 28 66 33 61 32 a. Plot these data in a scatter diagram....
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