document.write( "Question 573822: Number of cavities- In a dental survey of third-grade students, this distribution was obtained for the number of cavities found. Find the average number of cavities for the class. Use the weighted mean.\r
\n" ); document.write( "\n" ); document.write( "Number of students
\n" ); document.write( "12
\n" ); document.write( "8
\n" ); document.write( "5
\n" ); document.write( "5
\n" ); document.write( "Number of cavities
\n" ); document.write( "0
\n" ); document.write( "1
\n" ); document.write( "2
\n" ); document.write( "3 \n" ); document.write( "

Algebra.Com's Answer #368889 by stanbon(75887) $\"\"$ $\"About$

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Number of cavities- In a dental survey of third-grade students, this distribution was obtained for the number of cavities found. Find the average number of cavities for the class. Use the weighted mean.
\n" ); document.write( "Number of students
\n" ); document.write( "12
\n" ); document.write( "8
\n" ); document.write( "5
\n" ); document.write( "5
\n" ); document.write( "Number of cavities
\n" ); document.write( "0
\n" ); document.write( "1
\n" ); document.write( "2
\n" ); document.write( "3
\n" ); document.write( "----
\n" ); document.write( "weighted mean = (12*0+8*1+5*2+5*3]/30 = (8+10+15)/30 = 33/30 = 1.3
\n" ); document.write( "========================================
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "

\n" );