SOLUTION: What expression represents the standard deviation of the data set? 20, 16, 15, 40, 29 442 over 5, squared 282 over 4, squared 442 over 4, squared 282 over 5, squared Co

Algebra ->  Statistics  -> Describing-distributions-with-numbers -> SOLUTION: What expression represents the standard deviation of the data set? 20, 16, 15, 40, 29 442 over 5, squared 282 over 4, squared 442 over 4, squared 282 over 5, squared Co      Log On


   

Question 929418: What expression represents the standard deviation of the data set?
20, 16, 15, 40, 29
442 over 5, squared
282 over 4, squared
442 over 4, squared
282 over 5, squared
Could you explain in detail how to solve this? It doesn't make any sense to me.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi

	x	x -24	(x-24)^2	

	20	-4	16	

	16	-8	64	

	15	-9	81	

	40	16	256	

	29	5	25	

				

sum	120	0	442	

sum/5	24			variance

.........

Generally: variance: 442/(n-1) = 442/4  

sd = sqrt(variance)