## zarkam21 one year ago Help, will medal

1. zarkam21

2. welshfella

add up the last values in each row what do you get/

3. welshfella

That large E like character means the ' sum of all these 10 values'

4. welshfella

this sum is the answer to step 2

5. anonymous

Is this Sigma notation? mind if i stick around?

6. zarkam21

Well for the first row the total is 0. And for the second row is 224

7. zarkam21

@welshfella

8. zarkam21

@welshfella,, are you there?

9. anonymous

@cc_peach

10. zarkam21

Idk where he went, I really need help

11. anonymous

the second row is 224, that's answer for step 2

12. anonymous

$Standard deviation(S)=\sqrt{\frac{ \sum_{i=1}^{10} (x _{i}-\mu)^2}{ n-1 }}$=$\sqrt{\frac{ 224 }{ 10-1 }}$

13. zarkam21

So for step 3, it is 224 divided by 9?

14. welshfella

= sqrt((24.89)

15. welshfella

- sorry i got called away

16. anonymous

no, it's $\sqrt{\frac{ 224 }{ 9 }}$

17. zarkam21

So 24.89

18. welshfella

divide 224 by 9 first . Then take the square root

19. zarkam21

For step 3 ,,, 24.89

20. welshfella

the standard deviation = sqrt (24.89)

21. zarkam21

Okay so for step three the answer is sqrt 24.89

22. welshfella

yes

23. welshfella

so grab your calculator and evaluate it

24. zarkam21

4.99

25. welshfella

yea

26. zarkam21

Is that all?

27. zarkam21

Thank you