Calculate mean deviation and standard deviation. Interpret the results so obtained of the following

frequency distribution:- 4+4+2=10

00-09………………………….6

10-19………………………….8

20-29…………………………10

30-39…………………………15

40-49…………………………25

50-59………………………....30

60-69…………………………21

70-79…………………………19

80-89…………………………14

90-99………………………….9

100-109……………………….5