Question

If women have pulse rates that normally distributed with mean =74 and the standard deviation =12.0, then the probability that one woman randomly selected will have pulse rate less than 68 is approximately?

Answer 1

$Given \; that, μ=74, σ=12, then,\\ P(x< 68)=P(Z<\frac{68-74}{12})\\ =P(Z<-0.5)=0.5-P(0<Z<0.5)\\ =0.5-0.1915=0.3085\\$