Question

Assume that a randomly selected subject is given a bone density test. Those test scores are normally distributed with a mean of 0 and a standard deviation of 1. Find the probability that a given score is less than - 1.85 and draw a sketch of the region.

 Sketch the region. Choose the correct graph below. 

The probability is _______ (Round to four decimal places as needed.)

Answer 1

solution

given that,

z = -1.85

P(Z <-1.85) = 0.0322 ( using z table)

correct graph is B