Question

18, 18, 18, 18, 18, 18, 18, 18, 18, 18

Range:
Population Variance:
Population Standard Deviation:

Answer 1

Variance =σ2=n∑i(xi−¯x)2n Here, n = no. of terms =10 Now, ¯x=Mean=∑xn=6+8+10+12+14+16+18+20+22+2410=15010=15 ∴Mean=15 σ2=110((−9)2+(−7)2+(−5)2+(−3)2+(−1)2+12+32+52+72+92) =210(81+49+25+9+1) =15(165) =33 ∴Variance=33
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