document.write( "Question 629654: The mean of a list of 80 nos. is 230. If the four nos. 145,156,210 and 255 are added, what is the mean of the list of nos.\r
\n" ); document.write( "\n" ); document.write( "I asked this question yesterday and have been pondering it since then. I think I have the solution but would you check it for me please.\r
\n" ); document.write( "\n" ); document.write( "Sum of 80 nos. is 18,400 80*230
\n" ); document.write( "Sum of 4 nos added is 766
\n" ); document.write( "Mean of new list is 19166/84=228.17\r
\n" ); document.write( "\n" ); document.write( "Thank you \n" ); document.write( "

Algebra.Com's Answer #396395 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
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document.write( "Hi,
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document.write( "Good work!
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document.write( "Sum of 80 nos. is 18,400 80*230
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document.write( " Sum of 4 nos added is 766
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document.write( " Mean of new list is 19166/84=228.17 \r
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document.write( "Re: TY, Yes! You are exactly correct. \"Two-tailed\" z = 1.75 
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document.write( "Re: 110.25 for number of People...round 'Up' to .
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document.write( "Note:    \n" );
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