The data collected in its original form is called raw data. 15. The collection of information regarding objects is called data. Arrange the following data in descending order: 3.3, 3.2, 3.1, 3.7, 3.6, 4.0, 3.5, 3.9, 3.8, 4.1, 3.5, 3.8, 3.7, 3.9 and 3.4. Hence, the mean pocket expenses per day are ₹85.75. Learn and practice for CBSE class 7 maths using skill-based exercises and videos. It is mainly of two types i.e., primary and secondary data. 12. Prepare a frequency table for the scores. Question 26. Selina Solutions Concise Maths Class 7 Chapter 21 Data Handling provides students with the method of handling the given set of data. The NCERT book is one of the top materials when it comes to providing a question bank to practice. 5. SAT Subject Test: Math Level 1; IMO; Navodaya Vidyalaya; SEAMO; NSTSE-MATHS; Olympiad ; NTSE-Maths; Challenge; Q&A. Following data shows the weekly wages (in ₹) of 10 workers in a factory. If different values of variable x are 19.8,15.4,13.7,11.71,11.8, 12.6,12.8,18.6,20.5 and 2.1, find the mean. Chapter 21 deals with tabulation of data, arithmetic or average mean, properties of mean, median, mode and bar graph. NCERT Solutions Class 7 Maths Chapter 3 Data Handling. (ii) Find how many students have marks equal to or more than 70? Find the mean pocket expenses per day. The mean of marks scored by 100 students was found to be 40, later on it was discovered that a score of 53 was misread as 83. Become our. We know that the first six multiples of 3 are 3, 6, 9, 12, 15, 18. The marks obtained by 40 students of a class are given below : ICSE. Find the mean of 53, 61, 60, 67 and 64. (ii) Find how many students have marks equal to or more than 70? Grade 1; Grade 2; Grade 3; Grade 4; Grade 5; Grade 6; Grade 7; Grade 8 ; IGCSE. Find the mean of 53, 61, 60, 67 and 64. 11. Find the excluded number. 9. 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