78 92 98 87 86 72 92 81 86 92 the length of each interval is 6 what will be the frequency

 

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1 Answer

The data can be split into 5 groups as follows, with an interval of 6 between each group:

70-75: frequency = 1 (72)

76-81: frequency = 2 (78 and 81)

82-87: frequency = 3 (86, 86 and 87)

88-93: frequency = 3 (3 92’s)

94-99: frequency = 1 (98)

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