document.write( "Question 460526: mean is 60 and the standard deviation is 4.. Find the proability that X is less than 55. \n" ); document.write( "
Algebra.Com's Answer #315864 by edjones(8007)![]() ![]() You can put this solution on YOUR website! z=(55-60)/4 \n" ); document.write( "=-5/4=-1.25 \n" ); document.write( "Area under the normal curve below -1.25 standard deviations is .106= probability that x is less than 55. \n" ); document.write( ". \n" ); document.write( "Ed \n" ); document.write( " |