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  1. Chapter 3 Class 7 Data Handling
  2. Serial order wise

Transcript

Ex 3.1, 5 Following table shows the points of each player scored in four games: Now answer the following questions: (i) Find the mean to determine A’s average number of points scored per game. Average points of A = (π‘‡π‘œπ‘‘π‘Žπ‘™ π‘π‘œπ‘–π‘›π‘‘π‘  π‘œπ‘“ 𝐴 𝑖𝑛 π‘Žπ‘™π‘™ π‘”π‘Žπ‘šπ‘’π‘ )/(π‘π‘’π‘šπ‘π‘’π‘Ÿ π‘œπ‘“ π‘”π‘Žπ‘šπ‘’π‘  𝐴 π‘π‘™π‘Žπ‘¦π‘’π‘‘) = (14 + 16 + 10 + 10)/4 = 50/4 = 25/2 = 12.5 Ex 3.1, 5 Following table shows the points of each player scored in four games: Now answer the following questions: (ii) To find the mean number of points per game for C, would you divide the total points by 3 or by 4? Why? Mean points of C = (π‘‡π‘œπ‘‘π‘Žπ‘™ π‘π‘œπ‘–π‘›π‘‘π‘  π‘œπ‘“ 𝐢 𝑖𝑛 π‘Žπ‘™π‘™ π‘”π‘Žπ‘šπ‘’π‘ )/(π‘π‘’π‘šπ‘π‘’π‘Ÿ π‘œπ‘“ π‘”π‘Žπ‘šπ‘’π‘  𝐢 π‘π‘™π‘Žπ‘¦π‘’π‘‘) Number of games C played = 3 So, we divide the total by 3 Let’s also find the mean of C Mean points of C = (π‘‡π‘œπ‘‘π‘Žπ‘™ π‘π‘œπ‘–π‘›π‘‘π‘  π‘œπ‘“ 𝐢 𝑖𝑛 π‘Žπ‘™π‘™ π‘”π‘Žπ‘šπ‘’π‘ )/(π‘π‘’π‘šπ‘π‘’π‘Ÿ π‘œπ‘“ π‘”π‘Žπ‘šπ‘’π‘  𝐢 π‘π‘™π‘Žπ‘¦π‘’π‘‘) = (8 + 11 + 13)/3 = 32/3 = 10.66.. Ex 3.1, 5 Following table shows the points of each player scored in four games: Now answer the following questions: (iii) B played in all the four games. How would you find the mean?Mean = (π‘‡π‘œπ‘‘π‘Žπ‘™ π‘π‘œπ‘–π‘›π‘‘π‘  π‘œπ‘“ 𝐡)/(π‘π‘’π‘šπ‘π‘’π‘Ÿ π‘œπ‘“ π‘”π‘Žπ‘šπ‘’π‘  𝐡 π‘π‘™π‘Žπ‘¦π‘’π‘‘) = (0 + 8 + 6 + 4)/4 = 18/4 = 4.5 Ex 3.1, 5 Following table shows the points of each player scored in four games: Now answer the following questions: (iv) Who is the best performer? Mean of A = 12.5 Mean of B = 4.5 Mean of C = 10.66 Since mean of A is highest, A is the best performer

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.