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 Computer Math and Games in Pascal (preview) Lazarus Handbook

### Author Topic: Question about statistics  (Read 1478 times)

#### MaxCuriosus

• Full Member
• Posts: 111
##### Re: Question about statistics
« Reply #15 on: February 26, 2020, 12:19:52 am »
Bart,
following your clarification here is my suggested formula:

P = ( Pa + Pd ) / 2

where

Pa = A / ( A + B )
Pd = D / ( C + D )

With your numeric example that leads to P = 0.58, meaning that there is a 58% chance the treatement applied to a patient with condition X will result in the desired outcome.

#### Otto

• Full Member
• Posts: 225
##### Re: Question about statistics
« Reply #16 on: March 05, 2020, 12:07:25 pm »
Hello.
Bart, have you solved your statistical correlation problem yet?
Kind regards.

#### Bart

• Hero Member
• Posts: 3914
##### Re: Question about statistics
« Reply #17 on: March 05, 2020, 06:03:27 pm »
From what I've read I decided to use Fisher exact test.
That in itself presented another problem because I now had to calculate with large factorials, which tend to bomb out if you can't use 80-bit extended type.

Fotunately I rembered (from way back in high school) I could use logarithmics to avoid that.

Bart

#### Otto

• Full Member
• Posts: 225
##### Re: Question about statistics
« Reply #18 on: March 05, 2020, 10:08:16 pm »
Very well Bart, have you implemented everything in Lazarus/FPC?
Kind regards.

#### Bart

• Hero Member
• Posts: 3914
##### Re: Question about statistics
« Reply #19 on: March 05, 2020, 10:21:28 pm »
Very well Bart, have you implemented everything in Lazarus/FPC?

Of course I have.

Bart