Q2 : Determine the range of within 1 sigma from the mean. (within 1 sigma: [u - o, u + o]) Using the given dataset: mu sigma Defects per 100 Vehicles, 2010 Model Year Lower boundary Upper boundary Brand Defects Defects Within 1 sigma Acura 86 Brand Defects Brand Defects Brand Lower boundary Upper boundary Audi 111 Acura 86 Hyundai 102 MINI 133 Within 2 sigma BMW 113 Audi 111 Infiniti 107 Mitsubishi 146 How many data points fall within 1 sigma from the mean? 114 BMW 113 Jaguar 130 Nissan 111 Buick How many data points fall within 2 sigma from the mean? Cadillac 111 Buick 114 Jeep 129 Porsche 83 Chevrolet 111 Cadillac 111 Kia 126 Ram 110 Chrysler 122 Chevrolet 111 Land Rover 170 Scion 114 121 Dodge 130 Chrysler 122 Lexus 88 Suburu Ford 93 Dodge 130 Lincoln 106 Toyota 117 GMC 126 Ford 93 Mazda 114 Volkswagen 135 Honda 95 GMC 126 Mercedes-E 87 Volvo 109 Hyundai 102 Honda 95 Mercury 113 Infiniti 107