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The Relative Humidity (In %) of a Certain City for a Month of 30 Days Was as Follows - Mathematics

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The relative humidity (in %) of a certain city for a month of 30 days was as follows:-

98.1 98.6 99.2 90.3 86.5 95.3 92.9 96.3 94.2 95.1
89.2 92.3 97.1 93.5 92.7 95.1 97.2 93.3 95.2 97.3
96.2 92.1 84.9 90.2 95.7 98.3 97.3 96.1 92.1 89

(i) Construct a grouped frequency distribution table with classes

84 - 86, 86 - 88

(ii) Which month or season do you think this data is about?

(iii) What is the range of this data?

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Solution

(i) A grouped frequency distribution table of class size 2 has to be constructed. The class intervals will be 84 − 86, 86 − 88, and 88 − 90…

By observing the data given above, the required table can be constructed as follows.

Relative humidity (in %) Number of days (frequency)
84 − 86 1
86 − 88 1
88 − 90 2
90 − 92 2
92 − 94 7
94 − 96 6
96 − 98 7
98 − 100 4
Total 30

(ii) It can be observed that the relative humidity is high. Therefore, the data is about a month of rainy season.

(iii) Range of data = Maximum value − Minimum value

                           = 99.2 − 84.9 = 14.3

Concept: Presentation of Data
  Is there an error in this question or solution?

APPEARS IN

NCERT Class 9 Maths
Chapter 14 Statistics
Exercise 14.2 | Q 3 | Page 245

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