Mathematics
In a grouped frequency distribution, the class interval are 40 - 49, 50 - 59, …, 80 - 89. The upper boundary of the class (50 - 59) is :
59
59.5
49.5
60
Statistics
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Answer
Gap between the classes = 50 - 49 = 1
Adjustment factor = 0.5
Upper boundary for the class interval (50 - 59) = Upper limit + 0.5
= 59 + 0.5
= 59.5
Hence, option 2 is the correct option.
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