Learn To Be
Open menu
Enroll A Student
Become A Tutor
Partner With Us
Sign In
Close menu
Enroll A Student
Become A Tutor
Partner With Us
Sign in
Timed Test For
Sample and population standard deviation
Not ready for a timed test?
Practice this topic instead
Sample Problem
You have found the following ages (in years) of $4$ gorillas. Those gorillas were randomly selected from the $20$ gorillas at your local zoo: $\qquad7,\enspace 10,\enspace 15,\enspace 21$ ** Based on your sample, what is the average age of the gorillas? What is the standard deviation? Round your answers to the nearest tenth. ** Average age: $\quad$ [[☃ numeric-input 1]] years old Standard deviation: $\quad$ [[☃ numeric-input 2]] years
What's your name?
Duration
30 seconds
60 seconds (1 minute)
120 seconds (2 minutes)
180 seconds (3 minutes)
300 seconds (5 minutes)