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.
With the rapid expansion of railroads in the 1840âs and 1850âs . Ordinary people were traveling in large numbers, and there was an need for cheap luggage ,so thousands of carpetbags were manufactured. By the 1860âs carpetbags were carried by all most everyone, Men, Women, well to do , middle class and not so well to do. Carpetbags were the first suitcases made in large numbers. When you traveled during the Civil War (1861-1865) and though the 1870, you packed your Carpetbag .