Test Index

NCERT Class XI Mathematics - Statistics - Solutions

© examsnet.com
Question : 1 of 34
Marks: +1, -0
4, 7, 8, 9, 10, 12, 13, 17
Solution:  
Mean of the given data is
x−\overset{-}{x} = 4+7+8+9+10+12+13+178\frac{4+7+8+9+10+12+13+17}{8} = 808\frac{80}{8} = 10
xix_i 4 78 91012 13 17 Total
∣xi−10∣|x_i - 10|6 3 2 1 023 7 24
∴ M.D. about mean = 1n∑ni=1∣x1−x−∣\frac{1}{n} \sum^{\underset{i=1}{n}} \left|x_1 - \overset{-}{x}\right| = 18×24\frac{1}{8} \times 24 = 3
© examsnet.com
Go to Question:
Next Question