# 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 f lower cumulative distribution P upper 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.

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