Compute the standard deviation of the data set. Round to the nearest hundredth, if needed.

4.9, 4.9, 9.9, 9.9, 14.9

a. 3.74
b. 4.18
c. 8.9
d. 14

Question

Compute the standard deviation of the data set.  Round to the nearest hundredth, if needed.
 
4.9, 4.9, 9.9, 9.9, 14.9

a. 3.74
b. 4.18
c. 8.9
d. 14

anonymous · Answer

An explanation would be appreciated, too. I don't completely understand how to find standard deviation.

nikato · Answer

1. Find the mean of the set by adding it all up and then divide it by the #of terms u have which is 5 in your case.
2. Subtract each number by your mean and then square your difference.
3. Find the mean of all the squares and you will find ur answer

anonymous · Answer

Thank you soo much. That made things a lot clearer.

nikato · Answer

No problem. Hope you can solve it now