standard deviation shortcut formula

4:46

12:25

3:55

2:00

7:14

5:00

10:21

5:23

15:24

8:15

8:16

8:26

17:26

2:06

2:13

5:05

12:42

19:18

2:48

10:24

32:13

11:21

7:49

15:00

11:07

7:56

10:09

11:57

1:47

10:05

9:58

4:15

7:39

8:20

11:10

7:51

5:47

12:48

13:54

12:33

11:27

2:58

2:32

14:36

00:52

2:36

8:09

2:01

14:33

00:56

7:50

13:01

8:01

7:15

20:08

24:34

24:49

7:42

3:37

9:17