Question

Michael is 190cm tall. In his high school, heights are normally distributed with a mean of 165cm and standard deviation of 20cm. What is the probability that Michael's best friend is shorter than he is.?

Answer 1

NVM i got it lol

Answer 2

you just use Z-score
\[z=\frac{ 189.5-190 }{ 20 }= 1.225\]
and according to the Area under the normal distribution curve, we find that z-score 1.23= 0.8907, which is 89.07%