# Exponential distribution (chart) Calculator

## Calculates a table of the probability density function, or lower or upper cumulative distribution function of the exponential distribution, and draws the chart.

 select function probability density flower cumulative distribution Pupper cumulative distribution Q scale parameter b b＞0 [ initial percentile x x≧0 increment repetition ]
 $\normal Exponential\ distribution\\[10](1)\ probability\ density\\\hspace{30}f(x,b)={\large\frac{1}{b}e^{-\frac{x}{b}}}\\(2)\ lower\ cumulative\ distribution\\\hspace{30}P(x,b)={\large\int_{\small 0}^{\hspace{25}\small x}}f(t,b)dt={\large 1-e^{-\frac{x}{b}}}\\(3)\ upper\ cumulative\ distribution\\\hspace{30}Q(x,b)={\large\int_{\small x}^{\hspace{25}\small\infty}}f(t,b)dt={\large e^{-\frac{x}{b}}}\\$

Exponential distribution (chart)
 [1-4] /4 Disp-Num5103050100200
[1]  2010/10/27 23:53   Male / 20 level / A university student / Very /
Purpose of use
use as a very convenient calculator
Comment/Request
very nice, tidy GUI
[2]  2010/02/15 15:07   Male / 20 level / A specialized student / Very /
Comment/Request
very good calculating software.I hope this will work only if we are in touch with internet.very happy if u can make it as open source software,then one can install & run this calculating in the absence of internet connection
[3]  2009/05/28 05:41   Male / 50 level / A researcher / Very /
Purpose of use
Comment/Request
Very good! I wanted to understand if the average waiting time as perceived by the customers is twice as high for a bus service with random bus arrivals ( a pure Poisson distribution) compared with a service where the buses run at equal intervals like clockwork. A good mathematician could prove this in a few minutes. I used your site to generate data for the exponential function and then put the data into a spread sheet and calcuated the result. Not very elegant -- but it worked. Thanks. I would be glad to send you the study that I am doing that made use of this site. Sincerely,
[4]  2009/02/18 11:43   Female / 50 level / A teacher / Very /
Purpose of use
Teaching
Comment/Request
Thanks for providing excellent tool for my Statistics Teaching.

Sending completion

To improve this 'Exponential distribution (chart) Calculator', please fill in questionnaire.
Male or Female ?
Age

Occupation

Useful?

Purpose of use?