The class mark of the class 90-120 is
The class marks of the median class of the following data is
The class-mark of the class 130-150 is:
The class marks of a frequency distribution are given as follows: 15, 20, 25, ... The class corresponding to the class mark 20 is:
The class marks of a continuous distribution are: 1.04, 1.14, 1.24, 1.34, 1.44, 1.54 and 1.64. Is it correct to say that the last interval will be 1.55 - 1.73? Justify your answer.
The class mark of the class 10–25 is:
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