Easy -1.8 This is a straightforward calculation of mean and standard deviation from a small dataset of 10 values using standard formulas. It requires only direct application of memorized formulas with no problem-solving, conceptual understanding, or multi-step reasoning—purely mechanical arithmetic that any student with a calculator can complete.
1 Rachel measured the lengths in millimetres of some of the leaves on a tree. Her results are recorded below.
$$\begin{array} { l l l l l l l l l l }
32 & 35 & 45 & 37 & 38 & 44 & 33 & 39 & 36 & 45
\end{array}$$
Find the mean and standard deviation of the lengths of these leaves.
1 Rachel measured the lengths in millimetres of some of the leaves on a tree. Her results are recorded below.
$$\begin{array} { l l l l l l l l l l }
32 & 35 & 45 & 37 & 38 & 44 & 33 & 39 & 36 & 45
\end{array}$$
Find the mean and standard deviation of the lengths of these leaves.
\hfill \mbox{\textit{CAIE S1 2008 Q1 [3]}}