document.write( "Question 970788: The playing life of a Euclid MP3 player is normally distributed with a mean if 30,000 hours and a standard deviation of 500 hours. Matts MP3 player lasted for 31,500 hours. His MP3 Player lasted longer than what percent of other Euclid MP3 players?
\n" ); document.write( "1)68%. 2)95%. 3)99.7%. 4)more than 99.8%\r
\n" ); document.write( "\n" ); document.write( "I'm actually not sure with one to pick honestly... I need help thank you so much \n" ); document.write( "

Algebra.Com's Answer #593435 by reviewermath(1029) $\"\"$ $\"About$

You can put this solution on YOUR website!
The playing life of a Euclid MP3 player is normally distributed with a mean if 30,000 hours and a standard deviation of 500 hours. Matts MP3 player lasted for 31,500 hours. His MP3 Player lasted longer than what percent of other Euclid MP3 players?
\n" ); document.write( "1)68%. 2)95%. 3)99.7%. 4)more than 99.8% \r
\n" ); document.write( "\n" ); document.write( "Solution:
\n" ); document.write( "z score = $\"%2831500-30000%29%2F500+=+3\"$
\n" ); document.write( "P(Z < 3) = 0.9987 [4 decimal places]
\n" ); document.write( "Therefore, the answer is 4)more than 99.8% \n" ); document.write( "

\n" );