There are fewer large values and more small values. Values for an exponential random variable occur in the following way. It can be shown, too, that the value of the change that you have in your pocket or purse approximately follows an exponential distribution. Other examples include the length of time, in minutes, of long distance business telephone calls, and the amount of time, in months, a car battery lasts. For example, the amount of time (beginning now) until an earthquake occurs has an exponential distribution. The exponential distribution is often concerned with the amount of time until some specific event occurs.