the pulse rate( per minute) of 30 persons were recorded as given below: 61,76,72,73,71,66,78,73,68,81,78,63,72,75,80,68,75,62,71,81,73,60,79,72,73,74,71,64,76,71. construct a frequency table using class interval of equal width,one class interval being 60‐65. also construct a histogram for the above data
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