Math, asked by kp815157, 4 months ago

The S.D. for the following data ; 21, 16, 13, 11, 9, 14, 8, 14 is


Answers

Answered by pavitarsinghharveers
4

Answer:

21, 16, 13, 11, 9, 14, 8, 14 is

Answered by knjroopa
0

Step-by-step explanation:

  • So we have the given values as X and by adding we get 21 + 16 + 13 + 11 + 9 + 14 + 8 + 14 = 106
  • So total values is 8
  • We have Variance  = Ʃ (X – X bar)^2 / N – 1
  •                       So X bar = Ʃ X / N
  •                                       = 106 / 8
  •                                       = 13.25
  •    Now we need to find (X – X bar)
  •                        (X – X bar)    (X – X bar)^2
  •       21 – 13.25 = 7.75               60.0625
  •       16 – 13.25 = 2.75                 7.5625
  •        13 – 13.25 = - 0.25              0.0625
  •        11 – 13.25 = - 2.25              5.0625
  •          9 – 13.25 = - 4.25             18.0625
  •        14 – 13.25 = 0.75                 0.5625
  •          8 – 13.25 = - 5.25             27.5625
  •        14 – 13.25 = 0.75                 0.5625
  •                                            ---------------------------
  •                                                         119.5
  •             Substituting we get
  •                 Variance V = 119.5 / 8 – 1
  •                                     = 119.5 / 7
  •                                 V = 17.07
  • Now standard deviation = √ variance
  •                                           = √ 17.07
  •                      So S.D = 4.13

Reference link will be

https://brainly.in/question/26866585

Similar questions