Statistics & probability

Gamma distribution survival probability calculator

Find the chance that a gamma waiting time exceeds a threshold.

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Behind the numbers

How this calculation works

Find the chance that a gamma waiting time exceeds a threshold.

THE FORMULAP(X>x)=Q(shape,x/scale)

A worked example

With shape 2 and scale 1, about 73.58% of values exceed 1.

Good to know

Enter scale, the reciprocal of the rate.

Read the result

Find the chance that a gamma waiting time exceeds a threshold.

The primary result is labeled “Upper tail probability”. Keep the input definitions in view when comparing this result with another method.

Try a related calculation

Enter scale, the reciprocal of the rate.

For a related exercise, try the statistics calculator.

A few questions, answered

How can I check the default inputs by hand?

With shape 2 and scale 1, about 73.58% of values exceed 1.

Which rule does this calculator apply?

P(X>x)=Q(shape,x/scale)

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