| Exam Board | OCR MEI |
|---|---|
| Module | S1 (Statistics 1) |
| Year | 2009 |
| Session | June |
| Marks | 5 |
| Paper | Download PDF ↗ |
| Mark scheme | Download PDF ↗ |
| Topic | Measures of Location and Spread |
| Type | Vertical line chart construction |
| Difficulty | Easy -1.8 This is a very straightforward question requiring only basic statistical definitions and simple chart construction. Part (i) involves reading off the mode and finding the median from a small frequency table (trivial calculation), part (ii) is a routine plotting task, and part (iii) requires recognizing obvious positive skew from the data pattern. No problem-solving or mathematical manipulation required. |
| Spec | 2.02a Interpret single variable data: tables and diagrams2.02f Measures of average and spread2.02i Select/critique data presentation |
| Number of people | 1 | 2 | 3 | 4 |
| Frequency | 50 | 31 | 16 | 5 |
1 In a traffic survey, the number of people in each car passing the survey point is recorded. The results are given in the following frequency table.
\begin{center}
\begin{tabular}{ | l | c | c | c | c | }
\hline
Number of people & 1 & 2 & 3 & 4 \\
\hline
Frequency & 50 & 31 & 16 & 5 \\
\hline
\end{tabular}
\end{center}
(i) Write down the median and mode of these data.\\
(ii) Draw a vertical line diagram for these data.\\
(iii) State the type of skewness of the distribution.
\hfill \mbox{\textit{OCR MEI S1 2009 Q1 [5]}}