In the data set, what is the variance? 6 8 1 9 4
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variance=£x2/n - (£x/n)2
£ indicates summation of
£x2=36+64+1+81+16=198
£x= 6+8+1+9+4=28
= 198/5-(28/5)2
=198/5-784/25
=586/25
=8.56
£ indicates summation of
£x2=36+64+1+81+16=198
£x= 6+8+1+9+4=28
= 198/5-(28/5)2
=198/5-784/25
=586/25
=8.56
rishilaugh:
thanks
But the variance is 8.24.
Answer is wrong.
Calculation mistake. Please check it.
198/5 - 784/25 = (990 - 784)/25 = 206/25 = 8.24
You have computed 7.44, which is wrong.
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