document.write( "Question 1011399: As estimate of the mean time of continuous use until an
\n" ); document.write( "answering machine will first require service is desired. If
\n" ); document.write( "it can be assumed that α = 60 days, how large a sample
\n" ); document.write( "is needed so that one will be able to assert with 90%
\n" ); document.write( "confidence that the sample mean is off by at most 10
\n" ); document.write( "days? \n" ); document.write( "

Algebra.Com's Answer #627235 by ikleyn(52943) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "Stop flooding the forum!\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );