Homework 3 Solutions - Engineering Statistics | STAT 305, Assignments of Statics

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Stat 305 (Ghosh): HW3 Solutions P77. 3. @) 2 3 > = z - =£& . and 3 e . . x eg . . 3 . - . 28 105 110 5 120 125 Bottom Bolt Torque (ft Ibs) There are no obvious patterns. (b) The differences are -15, 0,20, 0, —5, 0, —5, 0, —5, 20, -25, —5, —10, —20, and 0. teeennnanatomman——natom—-— Top - Bottom 30 -20 -10 0 10 20 (ft lbs) The dot diagram shows that most of the differences are zero or negative and “truncated” at zero. The exception is the 10th piece of equipment, with a difference of 20. This point does not fit in with the shape of the rest of the differences, so it is an outlier. Since most of the differences are zero or negative, the bottom bolt generally Tequired more torque to loosen than the top bolt.