HARD
JEE Main/Advance
IMPORTANT
Earn 100

The mean deviation about the median for the following data:

xi 3 4 5 6 7 8 9
xf 4 3 2 1 4 5 1

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Important Questions on Statistics

MEDIUM
JEE Main/Advance
IMPORTANT

The mean deviation about the mean for the following data :

Class 100-120 120-140 140-160 160-180 180-200
Frequency 2 1 3 2 2
HARD
JEE Main/Advance
IMPORTANT

The mean deviation about the median for the following data is:

Class 0-10 10-20 20-30 30-40 40-50
Frequency 7 16 13 21 13
EASY
JEE Main/Advance
IMPORTANT
The mean of 7 observations is 11. If six of the observations are 2,6,8,10,12,18 then remaining one observation is
EASY
JEE Main/Advance
IMPORTANT
Median of the data 10,21,5,6,4,12,14,3, is
EASY
JEE Main/Advance
IMPORTANT
The mean of 5 observations 1,2,6, x and y is 4.4, then x+y is
MEDIUM
JEE Main/Advance
IMPORTANT
If i=110xi=60 and i=110xi2=360 then i=110xi3 is
MEDIUM
JEE Main/Advance
IMPORTANT
The variance of the following data is 6,7,8,12,13,15
EASY
JEE Main/Advance
IMPORTANT
If the variance of a data is 361 , then the standard deviation of the data is