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Sahay Sir > Question Answers > NCERT Class 9 > Maths > Chapter 14 - Statistics > 3. 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, etc. (ii) Which month or season do you think this data is about? (iii) What is the range of this data?

3. 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, etc. (ii) Which month or season do you think this data is about? (iii) What is the range of this data?

2. Classify the data in Q.1 above as primary or secondary data.