NCERT 2022 | दहन और ज्वाला - L5 | Combustion and Flame | CLASS 8 विज्ञान | 7 PM Class by Amba Mam

The marks obtained by 40 students of class IX in an examination are given below: 18, 8, 12, 6, 8, 16, 12, 5, 23, 2, 16, 23, 2, 10, 20, 12, 9, 7, 6, 5, 3, 5, 13, 21, 13, 15, 20, 24, 1, 7, 21, 16, 13, 18, 23, 7, 3, 18, 17, 16 Present the data in the form of a frequency distribution using the same class size, one such class being 15-20 (where 20 is not included)

The marks obtained by 40 students of class VIII in an examination are given below: 18,8,12,0,8,16,12,5,23,2,16,23,2,10,20,12,9,7,6,5,3,5, 13,21,13,15,20,24,1,7,21,16,13,18,23,7,3,18,17,16 Present the data in the form of a frequency distribution using the same class size, one such class being 15-20 (where 20 is not included).

Following are the number of members in 25 families of a village: 6, 8, 7, 7, 6, 5, 3, 2, 5, 6, 8, 7, 7, 4, 3, 6, 6, 6, 7, 5, 4, 3, 3, 2, 5. Prepare a frequency distribution table for the data using class intervals 0-2, 2-4, etc.

The given chart shows the number of students in Class 4, Class 5, Class 6 and Class 7 who got first class, second class and failed in the final examination. दिए गए आरेख कक्षा 4, कक्षा 5, कक्षा 6 और कक्षा 7 में उन छात्रों की संख्या को दशशाते हैं, जिन्होंने अंतिम परीक्षा में प्रथम श्रेणी, द्वितीय श्रेणी प्राप्त किया और जो असफल रहे। Which class has the highest number of students who passed? किस कक्षा में उत्तीर्ण होने वाले छात्रों की संख्या सबसे अधिक है?

The given chart shows the number of students in Class 4, Class 5, Class 6 and Class 7 who got first class, second class and failed in the final examination. दिए गए आरेख कक्षा 4, कक्षा 5, कक्षा 6 और कक्षा 7 में उन छात्रों की संख्या को दशशाते हैं, जिन्होंने अंतिम परीक्षा में प्रथम श्रेणी, द्वितीय श्रेणी प्राप्त किया और जो असफल रहे। Which class has the least number of students who passed? किस कक्षा में सबसे कम छात्र उत्तीर्ण हुए हैं?

The following data : 2, 5, 15, 25, 20, 12, 8, 7, 6, 16, 21,17, 30, 32, 23, 40, 51, 15, 2, 9, 57, 19, 25 is grouped in the classes 0 –5, 5 –10, 10 –15 etc. Find the frequency of the class 20 –25.

Thirty children were asked about the number of hours they watched TV programmes in the previous week. The results were found as follows: 1 6 2 3 5 12 5 8 4 8 10 3 4 12 2 8 15 1 17 6 3 2 8 5 9 6 8 7 14 12 (i) Make a grouped frequency distribution table for this data, taking class width 5 and one of the class intervals as 5 - 10. (ii) How many children watched television for 15 or more hours a week?

The distance (in km) of 40 engineers from their residence to their place of work were found as follows: 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 class size 5 for the data given above taking the first interval as 0-5 (5 not included). What main features do you observe from this tabular representation?