Easy -1.8 This is a direct formula application question worth only 1 mark. Students need to recall and substitute into the standard deviation formula σ = √(Σx²/n - (Σx/n)²), requiring basic arithmetic with a calculator. No problem-solving or conceptual understanding is tested—purely mechanical recall.
Given that \(\sum x = 364\), \(\sum x^2 = 19412\), \(n = 10\), find \(\sigma\), the standard deviation of \(X\).
Circle your answer.
24.8 \quad 44.1 \quad 616.2 \quad 1941.2
[1 mark]
Given that $\sum x = 364$, $\sum x^2 = 19412$, $n = 10$, find $\sigma$, the standard deviation of $X$.
Circle your answer.
24.8 \quad 44.1 \quad 616.2 \quad 1941.2
[1 mark]
\hfill \mbox{\textit{AQA AS Paper 2 2018 Q14 [1]}}