61	57	58	57	61	64	68	51	49	64
50	48	65	52	62	55	54	48	58	64
55	55	54	42	51	65	51	54	51	60
62	43	55	56	61	52	69	64	56	45

WHAT IS THE:

RANGE

NO. OF CLASSES

CLASS INTERVAL

MEASURES OF CENTRAL TENDENCY

• MEAN USING CLASS MARK
• MEAN USING CODED DEVIATION
• MEDIAN
• MODE