Ex 14.2, 3
The relative humidity (in %) of a certain city for a month of 30 days was as follows:
(i) Construct a grouped frequency distribution table with classes 84 - 86, 86 – 88…
We see that
Minimum = 84.9
& Maximum = 99.2
So, we take intervals as 84 – 86,
86 – 88, …… 98 – 100
(ii) Which month or season do you think this data is about?
Relative humidity is high.
So, the data is about a month of rainy season.
(iii) What is the range of this data?
Range of data = Maximum value − Minimum value
= 99.2 − 84.9
= 14.3

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Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.