Sample size

#1
I have a list of 5,500 returns and I'd like to find out the sample size to ensure we're at least getting 95% of them accurate.

I've come across a calculator that lets me do this, but I'm a bit confused as to what my "p" value is.

At the 95% CI with 5% level of precision and a "p" value of 50% (default), it says 359 should be checked. Is that correct? or should my "p" value be 95 meaning I should check 72?

Thanks.
 

Dason

Ambassador to the humans
#2
What exactly do you mean by " I'd like to find out the sample size to ensure we're at least getting 95% of them accurate."
 
#3
Hi, thanks for the reply. They all should be paid £100, but when checking some might not be, I want to ensure 95% of them are correct.
 
#4
Hi Jimaldo,

Generally, you may use one of the outlier recognition methods to identify potential outliers.
But in your case, you already know what is correct value, so just need to count the values ... or draw a histogram.