Question

Companies who design furniture for elementary school classrooms produce a variety of sizes for kids of different ages. Suppose the heights of kindergarten children can be described by a normal model with a mean of 39.2 inches and standard deviation of 1.9 inches.what fraction of kindergarten kids should the company expect to be less than 39 inches talk?

Answer 1

It will be very close to 50% as the mean of a normal distribution is also its median. For an exact value for x-score
z =(value-mean)/(standard deviation) and find the cumulative normal distribution association with this z-score.

for z = 0, cum normal is 50% , for z = 1, cum normal F = 84%