SerenityNetworks
Board Regular
- Joined
- Aug 13, 2009
- Messages
- 131
- Office Version
- 365
- Platform
- Windows
I use the workbook referenced below to provide me with the minimum sample sizes needed for a range of allowed errors, given a required accuracy and required confidence.
In a round-about way, I fill-down the BINOMDIST function in a column to provide me with the probability/confidence that my accuracy requirement will be met for a given sample size and given number of errors. This allows me to then look up the sample size where the probability/confidence I'm looking has been met (by the BINOMDIST formula).
The solution works perfectly. The results have been validated many times. However, it produces a huge (100+ mb) Excel file that is slow to calculate. In the example file provided I'm only giving 5 columns of formulas that are filled-down 200 rows. To accommodate the ranges I need to work with, I must fill-down 50k or more rows and across 75 or more columns. That makes for huge workbooks that are slow to calculate.
I'm wondering if anyone can show me a more elegant method to accomplish my goal. I've tried, but haven't been able to get away from using a massive number of columns and rows. It seems there should be a single formula that will do what I need, but I'm not mathematically inclined enough to be able to figure it out. Any help will be appreciated.
Thanks in advance,
Andrew
Dropbox link to workbook directory
or link to workbook directly if above doesn't work.
In a round-about way, I fill-down the BINOMDIST function in a column to provide me with the probability/confidence that my accuracy requirement will be met for a given sample size and given number of errors. This allows me to then look up the sample size where the probability/confidence I'm looking has been met (by the BINOMDIST formula).
The solution works perfectly. The results have been validated many times. However, it produces a huge (100+ mb) Excel file that is slow to calculate. In the example file provided I'm only giving 5 columns of formulas that are filled-down 200 rows. To accommodate the ranges I need to work with, I must fill-down 50k or more rows and across 75 or more columns. That makes for huge workbooks that are slow to calculate.
I'm wondering if anyone can show me a more elegant method to accomplish my goal. I've tried, but haven't been able to get away from using a massive number of columns and rows. It seems there should be a single formula that will do what I need, but I'm not mathematically inclined enough to be able to figure it out. Any help will be appreciated.
Thanks in advance,
Andrew
Dropbox link to workbook directory
or link to workbook directly if above doesn't work.
Last edited: