Question

Birth weights at a local hospital have a Normal distribution with a mean of 110 oz and a standard deviation of 15 oz. Calculate the Z score for when X = 100 oz. 0.67 2.28 -0.67 -1.00

Answer 1

-0.67

Explanation:

formula for z-score is:

z = (x - υ) /σ

where x is the observed value (100), υ is the mean (110) and σ is the standard deviation (15).

z = (100 - 110) /15

= -10/15

= -2/3

= -0.67