Professors: Estimating Mean and Standard Deviation Use the range rule of thumb to estimate the standard deviation of ages of all teachers at your college.
Step1 of 3:
Minimum age = 23
Maximum age = 70
Step2 of 3:
We need to estimate the standard deviation of ages of all teachers at your college by using the range rule of thumb.
Step3 of 3:
Based on a minimum age of 23 years and a maximum age of 70 years an estimate of the age standard deviation would be 11.75years.