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Previously on "Any maths / statistics whizzes here?"
Bored here, opened excel, put 100 into cell A1
in cell B1, I put: =A1-(A1*0.004) (i.e. B1 is the remainder after subtracting 0.4% from A1)
Copy that down and it takes 1150 weeks to get down to 1 person.
And 1323 weeks to get below 0.5
By 3448 weeks you're at 0.000100388
If you want to hit six sigma, it's 3142 weeks.
But that's probably not what you're looking for.
Do it again but this time bearing in mind the original requirement.
0.4% do the thing in a week. How long to reach 100%
Bored here, opened excel, put 100 into cell A1
in cell B1, I put: =A1-(A1*0.004) (i.e. B1 is the remainder after subtracting 0.4% from A1)
Copy that down and it takes 1150 weeks to get down to 1 person.
And 1323 weeks to get below 0.5
By 3448 weeks you're at 0.000100388
That's not really an issue, just semantics.
However Pooper is not completely thick, he's just reduced the problem to a level that's within his capabilities.
Here's some hints Pooper: read the past posts, work out what has been done and why.
but if he used the right number he'd get a similar number to you and NAT (1897 weeks to your 1860 ish)
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