document.write( "Question 528096: In a normal distribution the mean is 50 and the standard deviation is 5. Find the
\n" );
document.write( "proportion of values that do not lie between 48 and 52. \n" );
document.write( "
Algebra.Com's Answer #349145 by reviewermath(1029)![]() ![]() You can put this solution on YOUR website! P(X > 52) = P[Z>(52-50)/5] = P(Z > 0.4)= 0.3446 \n" ); document.write( "P(X < 48) = P[Z < (48-50)/5] = P(Z < -0.4) = 0.3446 \n" ); document.write( " \n" ); document.write( "We add the two probabilities to get the proportion of values that do not lie between 48 and 52, the result is 0.6892. \n" ); document.write( " |