In this lesson, we will understand the measures of spread or dispersion, which is the range, and we will look at the interquartile range in detail.

In this lesson, we will discuss the second important measure of central tendency, the median.

This video provides a clear explanation of the basic concepts of mean, median, and mode in statistics, which are known as the three measures of central tendency. Using an example of 15 children in a choir with different ages, the video...

A video entitled "Representing with Box Plots" that covers the process of constructing a box plot by hand.

Finding the Mean, Median and Mode | Statistics | Y7 Maths| FuseSchool

Howcast - Finding variance in a data set doesn't require a mathematician. Impress your employer or teacher with your knowledge of statistics without the headache of complicated computations or formulas.

Standard deviation quantifies how diverse the values of your data set are, and is useful in determining how different your numbers are from each other.

When you normalize a set of data, you map the original data range into another scale. The steps for normalizing a data set are described here.

Pupil outcome: I can use spreadsheet tools to sort and search data to find and analyse information. Key learning points: - Data can be sorted in ascending or descending order. - Filters can be applied to hide data that is not needed for...

Pupil outcome: I can understand what the mode is measuring, how it is measuring it and find the mode from data presented in a list. Key learning points: - The mode is a measure of central tendency. - The mode is the most frequently...

Pupil outcome: I can construct pictograms from data. Key learning points: - Data presented as a list can be represented as a pictogram - Data presented in a table can be represented as a pictogram - The icons chosen should not be...

Pupil outcome: I can calculate the mean from a grouped frequency table. Key learning points: - The mean is a measure of central tendency. - The mean can only be estimated with a grouped frequency table. - Calculating this from a grouped...

Pupil outcome: I can see that different statistical representations offer different insights into a set of data. Key learning points: - A pie chart and a bar chart offer different insights. - There are certain features of any...

Pupil outcome: I can use the different measures of central tendency and spread to compare two sets of data. Key learning points: - Statistical summaries of data can be used to make inferences about that data. - Two sets of statistical...

Pupil outcome: I can evaluate the range as a measure of spread, including a consideration of outliers. Key learning points: - The range can be affected by outliers in the data. - Removing these outliers will change the value of the...

Pupil outcome: I can construct/interpret composite bar charts and bar-line charts. Key learning points: - Certain data is suitable for a composite bar chart or bar-line chart. - The shape of the graph can be estimated from the data. -...

Pupil outcome: I can calculate the mean, median, mode and range from a stem and leaf diagram. Key learning points: - The range can be calculated from a stem and leaf diagram. - The mode can be calculated from a stem and leaf diagram. -...

Pupil outcome: I can identify the limitations of each measure of central tendency and identify which should be used. Key learning points: - The mode is a useful measure of central tendency for certain data sets. - The median is a useful...

Pupil outcome: I can understand what the median is measuring, how it is measuring it and find the median from data presented in a list. Key learning points: - The median is a measure of central tendency. - The median is the middle (or...

Pupil outcome: I can understand what the range is measuring, how it is measuring it and calculate the range from data presented in a range of different ways. Key learning points: - The range is a measure of spread. - The range is...

Pupil outcome: I can calculate the median, mode and range from a grouped frequency table. Key learning points: - The median and mode are measures of central tendency. - The range is a measure of the spread of the data. - Calculating...

Pupil outcome: I can construct and interpret pie charts. Key learning points: - Certain data is suitable for a pie chart. - The shape of the chart can be estimated from the data. - For larger data sets, technology can make constructing...

Pupil outcome: I can use measures of central tendency and spread to compare two data sets in context. Key learning points: - Data can be hard to compare when presented in differing formats. - Being able to convert/interpret differing...

Pupil outcome: I can interpret pie charts. Key learning points: - Knowing the angle size for a sector allows calculation of the frequency. - By knowing the total, statements can be made comparing the data. - Different pie charts may have...