Calculate standard deviation from short cut method: X f 5 26 10 29 15 40 20 35 25 26 30 18 35 14 40 12

Pragya,
 
X f dx = X - A (A= 25)
dx2
fdx
fdx2
5 26 -20 400 -520 10400
10 29 -15 225 -435 6525
15 40 -10 100 -400 4000
20 35 -5 25 -175 875
25 26 0 0 0 0
30 18 5 25 90 450
35 14 10 100 140 1400
40 12 15 225 180 2700
  f = 200     fdx = -1120 fdx2 = 26350

σ = fdx2N- fdxN2= 26350200  - -11202002= 131.75 - 31.36= 100.39σ = 10.02

  • 0
Plz answer fast..
  • 0
What are you looking for?