Question

According to a statistical​ journal, the average lengths of a newborn is 19.6 inches with a standard deviation of 1.2 inches. The distribution of lengths is approximately Normal. What is the probability that a newborn baby will have a length of 18 inches or​ less? (Please include steps)

Answer 1

Answer:

9.18%

Step-by-step explanation:

First, find the z-score.

z = (x − μ) / σ

z = (18 − 19.6) / 1.2

z = -1.33

Use a chart or calculator to find the probability:

P(Z < z) = 0.0918