The ages of dogs at an animal shelter are normally distributed with a mean of 3.9 years and a standard deviation of 1.2 years.
what is the age of a dog at the shelter with a z score of -1.7?
1.86 years
2.98 years
3.23 years
5.43 years
A negative z-score is BELOW the mean
3.9 -1.7 x 1.2 = 1.86 yrs
Age - 3.9
________ = -1.7 multiply both sides by 1.2
1.2
Age - 3.9 = -2.04 add .09 to both sides
Age = 1.86
+155 
