The weight (in kg)of 15 student of a class are 39,42,35,37,48,53,32,40,43,41,37,39,43,39,47,
(a) Find the range of the data?
(b) Find mean,mode and median?
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Answer:
A. Range = Highest weight - Lowest weight
= 53 - 32
= 21
B. Median ( arrange the number in ascending order )
And then find the number which is in centre.
median =
32,35,37,37,39,39,39,40,41,42,43,43,47,48,53
= 40 ( So 40 is the median because it is in the centre of the number.)
C. Mode: (The number which is observed maximum time)
Mode
= 39,42,35,37,48,53,32,40,43,41,37,39,43,39,47
= 39 ( 39 is observed maximum time)
Means: ( Sum of all observation ÷ Total number of observation)
Mean =
39+42+35+37+48+ 53+32+40+43+41+37+39+43+39+47/ 15
= 615 ÷ 15
= 41
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