Question

Which set of numbers has the mean with the least value? I{-9, - 7, 0, 4} II {-7, - 4, 6, 5} III {1, 0.1, 0.05, 0.05} IV {0, 5, 15, 2 }

Answer 1

mean for the given sets can be calculated as,

$\begin{gathered} setI=\frac{-9-7+0+4}{4} \\ =\frac{-16+4}{4} \\ =\frac{-12}{4} \\ =-3 \end{gathered}$$\begin{gathered} \text{set ii =}\frac{-7-4+6+5}{4} \\ =\frac{-11+11}{4} \\ =0 \end{gathered}$$\begin{gathered} \text{ set iii =}\frac{1+0.1+0.05+0.05}{4} \\ =\frac{1.2}{4} \\ =0.3 \end{gathered}$$\begin{gathered} \text{ set iv = }\frac{0+5+15+2}{4} \\ =\frac{22}{4} \\ =5.5 \end{gathered}$