:(10 points)

The analyst at PayPal continues to expand his analysis and begins to study PayPal customers in Europe.He modifies his definition of X to change the units from US dollars to Euros:

LetX =amount by which an individual customer has exceeded their credit limit

for a given month (measured in Euros)

An initial small sample (n = 20) is taken and the following statistics are calculated:

= 800s = 207.395

How many more PayPal customers should be added to the sample if the analyst would like to be 99% confident that his estimate of X was within 50 of the true value?

Number of additional PayPal customers needed in sample =