( Part -2 ) Exercise 14.2 Que-1,2 and 3 class 9th maths chapter -14 ( Statistics )

( Part 2 ) Exercise 14.2 Questions 1, 2, and 3, Class 9 Maths Chapter 14 ( Statistics ) Exercise 14.2 Question 1: Blood Groups of 30 Students Question: The blood groups of 30 eighth-grade students are: A, B, O, O, AB, O, A, O, B, A, O, B, A, O, O, A, AB, O, A, A, O, O, AB, B, A, O, B, A, B, O. Present this data as a frequency distribution table. Indicate which blood group is most common and which is rarest? Question 2: Distances (in km) from the residences of 40 engineers to their workplaces Question: The distances from the residences of 40 engineers to their workplaces are: 5, 3, 10, 20, 25, 11, 13, 7, 12, 31, 19, 10, 12, 17, 18, 11, 32, 17, 16, 2, 7, 9, 7, 8, 3, 5, 12, 15, 18, 3, 12, 14, 2, 9, 6, 15, 15, 7, 6, 12. Construct a grouped frequency distribution table with a width of 5, taking the first interval as 0-5 (not including 5). Question 3: Relative humidity (%) of a city for 30 days Question: The relative humidity of a city for a month of 30 days was: 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) A classification is made by taking the classes 84-86, 86-88, etc. Create a frequency distribution table. (ii) Can you tell which month or season these data belong to? (iii) What is the range of these data?