Variance is the average of the squared deviations from the arithmetic mean. The standard deviation is a square root from variance value. The standard deviation is a measure of the variability of values around the mean and is meant to be used with values that are normally distributed (e.g., follow a normal curve).
This integrated the seat belts and airbag into a restraint system, rather than the airbag being considered an alternative to the seat belt. In 1987, the Porsche 944 turbo became the first car to have driver and passenger airbags as standard equipment. The Porsche 944 and 944S had this as an available option. The same year also saw the first airbag in a Japanese car, the Honda Legend.
To celebrate what would've been Coco Chanel's birthday today, we're focusing on the quilted 2.55 bag and the stories and history behind its creation. âThe name 2.55 is the bag's own birthday: It was created in February 1955. âIt wasn't the first Chanel-designed bag. That honor belongs to a piece created in 1929, but the 2.55 was modified for practical reasons. I got fed up with holding my purses in my hands and losing them, so I added a strap and carried them over my shoulder, Chanel was reported as saying in Coco Chanel by Justine Picardie.