STAT 200 Week 3 Homework Problems - The Best Solutions. Graded A+

STAT 200 Week 3 Homework Problems 4.1.4 A project conducted by the Australian Federal Office of Road Safety asked people many questions about their cars. One question was the reason that a person chooses a given car, and that data is in table #4.1.4 ("Car preferences," 2013). Table #4.1.4: Reason for Choosing a Car Safety Reliability Cost Performance Comfort Looks 27 Find the probability a person chooses a car for each of the given reasons. Total = 84+62+46+34+47+27=300 P(Safety) = 84/300=0.28 P(Reliability) = 62/300=0.27 P(Cost) = 46/300=0.15 P(Performance) = 34/300=0.11 P(Comfort) = 47/300=0.16 P(Looks) = 27/300=0.09 4.2.2 Eyeglassomatic manufactures eyeglasses for different retailers. They test to see how many defective lenses they made in a time period. Table #4.2.2 gives the defect and the number of defects. Table #4.2.2: Number of Defective Lenses Defect type Number of defects Scratch 5865 Right shaped – small 4613 Flaked 1992 Wrong axis 1838 Chamfer wrong 1596 Crazing, cracks 1546 Wrong shape 1485 Wrong PD 1398 Spots and bubbles 1371 Wrong height 1130 Right shape – big 1105 Lost in lab 976 Spots/bubble – intern 976