Q&A #3831


T2T || FAQ || Ask T2T || Teachers' Lounge || Browse || Search || T2T Associates || About T2T

View entire discussion

From: Liz Colonna
To: Teacher2Teacher Service
Date: May 01, 2000 at 14:38:22
Subject: Statistics

When using confidence intervals to estimate the population mean for large samples and small samples, the cut-off number for sample size is n=30 for large samples. What was the process that mathematicians used to come up with 30 as the cut-off point? My students thought that a large sample would be in the hundreds, not a number as small as 30. Thanks!

Post a public discussion message
Ask Teacher2Teacher a new question

[Privacy Policy] [Terms of Use]

Math Forum Home || The Math Library || Quick Reference || Math Forum Search

Teacher2Teacher - T2T ®
© 1994- The Math Forum at NCTM. All rights reserved.