Subject Content: Statistical Ideas and Methods
The course covers a wide range of statistical concepts, including data collection, analysis, interpretation, and elementary probability.
1. Data Collection and Representation
Includes sampling methods (**random, stratified, quota**), avoiding bias, survey design, and classifying data (qualitative/quantitative). Covers tables and diagrams like **pictograms** and **Venn diagrams**.
2. Frequency and Cumulative Distributions
Organizing data into **grouped/ungrouped frequency distributions**, including class boundaries and mid-points. Visual representation using **frequency polygons** and **histograms**.
3. Measures of Central Tendency and Dispersion
Calculating the **mean, median, and mode**. Analyzing dispersion using **range, interquartile range, variance, and standard deviation**. Also covers **linear transformations**.
4. Rates and Index Numbers
Includes the use of **crude and standardized rates** and **weighted aggregate index numbers** for applications like death rates and price relatives.
5. Correlation and Time Series
Creating **scatter diagrams**, understanding **correlation** (positive, negative, strong, weak), finding lines of best fit, and analyzing trends using **moving averages**.
6. Probability and Distributions
Introduction to **elementary probability**, understanding mutually exclusive and independent events, and using **probability distributions** for discrete variables.
Skill Development Focus
The course equips learners to interpret, calculate, and present statistical data in various contexts.
Data Interpretation & Justification
Practicing data interpretation and justifying the use of specific analytical methods.
Numerical Accuracy & Problem-Solving
Performing statistical calculations accurately and applying methods to solve real-life problems.
Communication
Developing the ability to communicate statistical conclusions clearly and logically.
Assessment Structure
Assessment consists of two compulsory written papers, with candidates expected to use electronic calculators in both.
- **Duration:** 2 hours and 15 minutes
- **Format:** Short questions (up to 8 marks each) and four longer questions (14–16 marks each).
- **Weighting:** 50% of the total qualification.
- **Duration:** 2 hours and 15 minutes
- **Format:** Short questions (up to 8 marks each) and four longer questions (about 15 marks each).
- **Weighting:** 50% of the total qualification.
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