Quick Revision

Grade
Subject
Category

Need some help with quick revision of key concepts?

We’ve put together some packs of study cards to help you brush up on key concepts before tests and exams. Use the drop down menus in the search boxes above to select the grade, subject and category of content you want to revise. We’re adding new packs of study cards all the time, so check back if you can’t find what you’re looking for or contact us to make a suggestion.

Grade 12 Mathematical Literacy, Data handling

Define classical probability.

Grade 12 Mathematical Literacy, Data handling

Classical probability is the chance of an event occurring, calculated mathematically.

Grade 12 Mathematical Literacy, Data handling

Explain the term cumulative frequency.

Grade 12 Mathematical Literacy, Data handling

The cumulative frequency of a dataset is the total of the values in a frequency table continuously added as the table progresses.

Grade 12 Mathematical Literacy, Data handling

Define empirical probability.

Grade 12 Mathematical Literacy, Data handling

Empirical probability determines the chance of an event occurring from the data collected by studying actual events.

Grade 12 Mathematical Literacy, Data handling

What is the modal class of a dataset?

Grade 12 Mathematical Literacy, Data handling

When data have been grouped in classes, the class with the highest frequency is the modal class.

Grade 12 Mathematical Literacy, Data handling

What is the mode of a dataset?

Grade 12 Mathematical Literacy, Data handling

The mode is the value that appears most often in a dataset.

Grade 12 Mathematical Literacy, Data handling

How do we find the median of a dataset?

Grade 12 Mathematical Literacy, Data handling

The median is the midpoint of a dataset. To find the median, arrange the data in order, from the highest to the lowest value, or the lowest to the highest.

Grade 12 Mathematical Literacy, Data handling

How do we find the mean of a dataset?

Grade 12 Mathematical Literacy, Data handling

The mean is the arithmetic average of a dataset. To find the mean, add all the values and divide the total by the number of values that have been added.

Grade 12 Mathematical Literacy, Data handling

What is bimodal data?

Grade 12 Mathematical Literacy, Data handling

Bimodal data has two modes. In other words, in a bimodal dataset, two values appear the same number of times.

Grade 12 Mathematical Literacy, Data handling

What is the difference between a percentage and a percentile?

Grade 12 Mathematical Literacy, Data handling

Percentage gives the actual value out of a hundred. A percentile divides a dataset into hundred equal groups and gives an indication of the place in a row of values.

Grade 12 Mathematical Literacy, Data handling

Explain the process of researching to solve problems in life.

Grade 12 Mathematical Literacy, Data handling

Research is the gathering of information in a systematic way. Research involves collecting data in the form of interviews, questionnaires or searching existing databases.

Grade 12 Mathematical Literacy, Data handling

In statistics, what is the difference between a population and a sample?

Grade 12 Mathematical Literacy, Data handling

The population is the entire group of people or items that researchers want to study. The sample is a small group of people or items selected from the population.

Grade 12 Mathematical Literacy, Data handling

What is a scatter plot?

Grade 12 Mathematical Literacy, Data handling

A scatter plot is a graph constructed from all the pairs of coordinates in a data set where each pair is represented by a dot on the map.

Grade 12 Mathematical Literacy, Data handling

Explain the word tendency in terms of datasets.

Grade 12 Mathematical Literacy, Data handling

Tendency means that the data leans in a certain direction or that there is a general change one direction.

Grade 12 Mathematical Literacy, Data handling

Explain the difference between correlation and causation.

Grade 12 Mathematical Literacy, Data handling

Correlation means that two ideas are connected. Causation means that one aspect causes the occurrence of the other.

Grade 12 Mathematical Literacy, Data handling

The range of a dataset is the highest value minus the lowest value.

Grade 12 Mathematical Literacy, Data handling

Probability is the chance or liklihood of an event occurring. Probability is expressed as a ratio (a fraction or percentage).

1 of 30