From the prices of shares X and Y below, find out which is more stable in value X 35 54 52 53 56 58 52 50 51 49 . Y 108 107 105 105 106 107 104 103 104 101

Explanation

Here, Mean(X), `barX = (sumX_i)/N = 510/10 = 51`

Mean(Y),`barY = (sumY_i)/N = 1050/10 = 105`

Now, we can draw table for `barX-X and barY-Y`.

Please refer to video for the table.
Now,
Variance(X), `(sigma_X)^2 = (sum(barX-X)^2)/N = 350/10=35`

`sigma_X = sqrt35 ~~ 5.9`

Coefficient of variation,`C.V._X = sigma_x/barX**100 = 5.9/51*100 = 14% `

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