28. Bone Length Research performed at NASA, led by Dr. Emily R. Morey-Holton, measured the lengths of the right humerus and right tibia in 11 rats that were sent to space on Spacelab Life Sciences 2. The data on page 175 were collected. (a) Draw a scatter diagram of the data treating length of the right humerus as the independent variable. (b) Based on the scatter diagram, do you think that there is a linear relation between the length of the right humerus and the length of the right tibia? (c) Use a graphing utility to find the line of best fit relating length of the right humerus and length of the right tibia. (d) Predict the length of the right tibia on a rat whose right humerus is 26.5 millimeters (mm). Right Humerus (mm), x Right Tibia (mm), y 24.80 36.05 24.59 35.57 24.59 35.57 24.29 34.58 23.81 34.20 24.87 34.73 25.90 37.38 26.11 37.96 26.63 37.46 26.31 37.75 26.84 38.50 Source: NASA Life Sciences Data Archive

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