The average time between accidents in a factory is 11 weeks. Find the probability that more than 19 weeks pass between accidents.

Answer 1

Using the Geogebra Calculator Suite under Probability mode and choosing the Poisson distribution:

Set the mean to µ = 11 and choose the right sided intervals marked [

For more than 19 we want 20 <= X.

We get the P( 20 <= X ) = 0.0092894579681.

Hope this helps!