CBSE Questions for Class 11 Commerce Applied Mathematics Descriptive Statistics Quiz 12 - MCQExams.com

If the variance of the data 2,4,5,6,8,17 is 23,33, then variance of 5,11,14,17,23,50 is ________________.
  • 46,66
  • 96.32
  • 209,97
  • 213,97
Ina a class of 20 students, each student can score 10 or 0 marks in a certain examination. The maximum possible variance in the marks of the students in the class is
  • 24
  • 22
  • 20
  • 25
In a series of 100 observations, half of them is equal to p and remaining half equal to p if the standard deviation of these observations is 10 then |p|=__   
  • 10
  • 110
  • 110
  • 10
i=110(Xi10)2=2000i=110Xi10=100 then the standard deviation of data set Xi.
  • 1
  • 5
  • 10
  • 2
If the standard deviation of x1,x2,...,xn is 3.5 then the standard deviation of 2x13,2x23,...,2xn3 is
  • -7
  • 10.5
  • 7
  • -10
Find the standard deviation of 10 observation 111, 211, 311,.......,1011.
  • 1003
  • 250
  • 300
  • 5033
The variance of the first n natural number is 
  • 112(n21)
  • 16(n21)
  • 16(n2+1)
  • 112(n2+1)
The standard deviation of the data 6, 5, 9, 13, 12, 8, 10 is
  • 527
  • 6
  • 527
  • 6
0:0:1


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