Standard Deviation, SM-Bank 001

The ages of nine students were recorded in the table below.

What is the standard deviation, correct to two decimal places? (2 marks)

--- 4 WORK AREA LINES (style=lined) ---
Briefly explain what is meant by the term standard deviation. (1 mark)

--- 2 WORK AREA LINES (style=lined) ---

Show Answers Only

i. \(\text{By calculator (in Statistics mode):} \)

\(\text{Std Dev}\ = 1.5947… = 1.59\ \ \text{(to 2 d.p.)} \)

ii. \(\text{Standard deviation is a measure of how much members}\)

\(\text{of a data group differ from the mean value of the group.}\)

Show Worked Solution

i. \(\text{By calculator (in Statistics mode):} \)

\(\text{Std Dev}\ = 1.5947… = 1.59\ \ \text{(to 2 d.p.)} \)

ii. \(\text{Standard deviation is a measure of how much members}\)

\(\text{of a data group differ from the mean value of the group.}\)