You have found the following ages (in years) of all 5 zebras at your local zoo: 8, 11, 17, 7, 19? What is the standard deviation? Round your answers to the nearest tenth.

And the can be founded with this formula:

And rounded to the nearest tenth we got

Step-by-step explanation:

For this case we have the following data given:

8, 11, 17, 7, 19

The first step is calculate the sample mean with this formula:

And replacing we got:

And the deviation can be founded with this formula:

And replacing we got:

And rounded to the nearest tenth we got

40 x 50 = 2000

step-by-step explanation:

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!