suppose that the manufacturing process described in the previous example produces engines whose weights are normally distributed with a mean of 1250 and a standard deviation of 12. The following ...

Ask someone to tell you how long their commute is, and they can probably provide an average number without much thought. But ask them how much it varies, and they will most likely have to pause and ...

Standard deviation tells you how wild those income swings might be. In our example, Job A's steady salary would have a smaller standard deviation (in fact, none at all month to month), while Job B ...