My Math Forum Basic math?

 November 9th, 2010, 12:48 PM #1 Newbie   Joined: Nov 2010 Posts: 1 Thanks: 0 Basic math? Hi, I'm having some trouble with what I believe is basic math - I just can't remember what to do here... I'm doing stats - Kolmogorov-Smirnov test; I need to know which of the following is significantly different from zero: 2.6488505967818445E-4 2.4752235474300806E-6 My real problem is what does E-4 and E-6 mean? is it 2.4752235474300806 "exponent" -6? Thanks for any help in advance.
 November 9th, 2010, 01:42 PM #2 Global Moderator   Joined: May 2007 Posts: 6,704 Thanks: 669 Re: Basic math? 2.0E-4 means 0.00020 2.1E-6 means 0.0000021 Understand?
 November 9th, 2010, 03:36 PM #3 Senior Member     Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,211 Thanks: 520 Math Focus: Calculus/ODEs Re: Basic math? $m\text{E}n=m\times 10^n$ In standard scientific notation, the convention is $1\le m<10$
November 9th, 2010, 08:22 PM   #4
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Re: Basic math?

Quote:
 Originally Posted by MarkFL $m\text{E}n=m\times 10^n$ In standard scientific notation, the convention is $1\le m<10$
Yes, and in standard engineering notation the convention is that n is a multiple of 3 and $1\le m<1000$.

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