Statistics And Probability Question 132
Question: Following are the marks obtained by 9 students in a mathematics test: 50, 69, 20, 33, 39, 40, 65, 59 the mean deviation from the median is
Options:
A) 9
B) 10.5
C) 12.67
D) 14.76
Show Answer
Answer:
Correct Answer: C
Solution:
[c] Marks obtained by 9 students in Mathematics are: 50, 69, 20, 33, 53, 39, 40, 65, 59 Let us rewrite the given data in ascending order. 20, 33, 39, 40, 50, 53, 59, 65, 69, Here, n = 9 Median $ (M_{e}) $ = 5th term=50 $ x_{i} $ $ d_{i}=| x_{i}-M_{e} | $ 20 30 33 17 39 11 40 10 50 0 53 3 59 9 65 15 69 19 N=2 $ \Sigma ,d_1=114 $ $ M.D.=\frac{114}{9}=12.67 $
BETA
