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Class 11-science RD SHARMA Solutions Maths Chapter 32 - Statistics

Statistics Exercise Ex. 32.1

Solution 1(i)

Solution 1(ii)




Solution 1(iii)




Solution 1(iv)





Solution 1(v)




Solution 2(i)



Solution 2(ii)

 

Solution 2(iii)



Solution 2(iv)


Solution 2(v)

Solution 4

Solution 5(i)



Solution 5(ii)










































Solution 5(iii)



Solution 6

Solution 3

  

Note: Answer given in the book is incorrect.

Statistics Exercise Ex. 32.2

Solution 1

Solution 2


Solution 3

Solution 4(i)

Solution 4(ii)


Solution 4(iii)


Solution 4(iv)

Solution 5(ii)


Solution 5(iii)

Solution 4(v)

  

Solution 5(i)

  

Note: Answer given in the book is incorrect.

 

Statistics Exercise Ex. 32.3

Solution 1



Solution 2(i)


Solution 2(ii)

Solution 2(iii)


Solution 3


Solution 4


Solution 5

Solution 7

Solution 8

Solution 6

  

Statistics Exercise Ex. 32.4

Solution 1(i)




Solution 1(ii)




Solution 1(iii)

Solution 1(iv)

Solution 2

Solution 3

Solution 4

Solution 5

Solution 6

Solution 7

Solution 8

Solution 9


Solution 10

Solution 11

  

Statistics Exercise Ex. 32.5

Solution 1


Solution 2



Solution 3

Solution 4

Statistics Exercise Ex. 32.6

Solution 1


Solution 2


Solution 3


Solution 4

Solution 5

Solution 7

Solution 8

Solution 9

Solution 6

  

Note: Answer given in the book is incorrect. 

 

Solution 10

  

Statistics Exercise Ex. 32.7

Solution 1

We observe that the average monthly wages in both firms is same i.e. Rs. 2500. Therefore the plant with greater variance will have greater variability. Thus plant B has greater variability in individual wages. 

Solution 2

Solution 3

Solution 4


Solution 5

Solution 6

Solution 7

Solution 8




Solution 9


Solution 10




Solution 11

  

Solution 12

  

Statistics Exercise Ex. 32VSAQ

Solution 1

Solution 2

Solution 3

Solution 4

W e space k n o w space t h a t space i f space y subscript i equals a x subscript i plus b comma space t h e n space v a r left parenthesis Y right parenthesis equals a squared left square bracket v a r left parenthesis X right parenthesis right square bracket
H e r e comma space Y equals fraction numerator a X plus b over denominator c end fraction equals a over c X plus b over c
T h e r e f o r e comma space v a r left parenthesis Y right parenthesis equals space a squared over c squared left square bracket v a r left parenthesis X right parenthesis right square bracket equals fraction numerator a squared sigma squared over denominator c squared end fraction
S. D. equals open vertical bar a over c close vertical bar sigma

Solution 5

Solution 6

New SD is open vertical bar a close vertical bar sigma

Solution 7

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