- MA4-DAT-C-02 analyses simple datasets using measures of centre, range and shape of the data
📖 Prior Knowledge
| Content | Prerequisite relationships |
|---|---|
| Data B | - Compare data displays by range and mode → Compare datasets using measures |
| Equations | - Solve equations from formulas → Find a data value given the mean |
| Data Classification and Visualisation | - Represent data with a variety of graphs → Describe the modality of a dataset - Represent data with a variety of graphs → Describe the shape of a distribution |
Calculate and compare the mean, median, mode and range for simple datasets.pdf
- Calculate the mean () of a set of data using digital tools
- Calculate and describe the mean, median, mode and range of a dataset
- Classify the mean, median and/or mode as measure(s) of centre to represent the average or typical value of a dataset
- Describe and interpret data displays using mean, median and range
- Identify and describe datasets as having no modes (uniform), one mode (unimodal), 2 modes (bimodal) or multiple modes (multimodal)
- Identify the range as a measure of spread to describe variation in a dataset
- Compare simple datasets using the mean, median, mode and range
Interpret the effect individual data points have on measures of centre and range.pdf
- Informally identify clusters, gaps and outliers in datasets and give reasons for their occurrence in the context of the data
- Identify and explain the impact of adding or removing data values that are clustered at one end of a dataset on the measures of centre
- Identify and explain the impact of outliers on the measures of centre and range
- Determine and justify the most appropriate measure of centre to summarise the data in its context
Analyse datasets presented in various ways and draw conclusions.pdf
- Identify and describe the shape and distribution of a dataset using the terms symmetrical, negatively skewed and positively skewed
- Define a census as a study of every unit, everyone or everything in a population
- Define a sample as a subset of units in a population selected to represent all units in a population of interest
- Draw conclusions and make informed decisions about data gathered using data-collection techniques, including census and sampling, which is then presented in tables, graphs and charts