You are Here: Home >< Maths

# poisson distribution help watch

1. Accidents occur at a factory at an average rate of 5 per month. Find the probabilities that,
(b) there will be exactly 62 in a year.

so far I have figured out the new mean as 60 and have tried to work out
p(x=62) = (e^-60 x 60^62)/62!
I have typed this into the calculator and got error. Thanks in advance
2. (Original post by Butterflyshy)
Accidents occur at a factory at an average rate of 5 per month. Find the probabilities that,
(b) there will be exactly 62 in a year.

so far I have figured out the new mean as 60 and have tried to work out
p(x=62) = (e^-60 x 60^62)/62!
I have typed this into the calculator and got error. Thanks in advance
the value of lambda is scaled linearly for different time periods. in 12 months there will be on average 12 times as many accidents as in 1 month.

your method is right... the value is

0.04895671125 from the computer.

on your calculator it is better to do an approximation.... Normal with mean lambda & Variance lambda should work.
3. you will need to apply a continuity correction as Poisson is for discrete data & Normal is for continuous.
4. (Original post by the bear)
you will need to apply a continuity correction as Poisson is for discrete data & Normal is for continuous.
thanks I'm getting the right answer now

### Related university courses

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: November 14, 2017
The home of Results and Clearing

### 2,765

people online now

### 1,567,000

students helped last year
Today on TSR

### University open days

1. Sheffield Hallam University
Tue, 21 Aug '18
2. Bournemouth University
Wed, 22 Aug '18
3. University of Buckingham
Thu, 23 Aug '18
Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams