Did I Get This – Standard Deviation Rule

Published: December 21st, 2012

Category: Activity 2: Did I Get This?

In general, the larger the animal the longer the length of pregnancy (also called gestation period). For the horse, for example, the gestation period varies roughly according to a normal distribution with a mean of 336 days and a standard deviation of 3 days (Source: These figures are from Moore and McCabe, Introduction to the Practice of Statistics). Use the Standard Deviation Rule to answer the following questions: (a picture of the SD rule applied to this distribution will help).



The body temperatures of dogs are normally distributed with a mean of 101.3°F and a standard deviation of .6°F. Use this information to answer the following questions:


This document is linked from The Normal Shape.