Y10 Foundation: Topic 27: Information from large data sets

Objectives:

Identify the modal class interval in grouped and ungrouped frequency distributions

Find the class interval containing the median value

Find the mean of an ungrouped frequency distribution

Find an estimate for the mean of a grouped frequency distribution by using the mid-interval value

Use the statistical functions on a calculator or a spreadsheet to calculate the mean for discrete data

Prior Knowledge:

Information from small datasets

Finding the average of two numbers (ie the midpoint)

Key Vocabulary:

Copy and paste here.

Differentiation & Extension:

Find the mean for grouped continuous data with unequal class intervals

Collect continuous data and decide on appropriate (equal) class intervals; then find measures of average

Find the median by cumulative frequency diagram

Consider other measures of spread, eg interquartile range; appreciate advantages/limitations of the range

Use the statistical functions on a calculator or a spreadsheet to calculate the mean for continuous data

Using & Applying ideas:

Collaborate here.

NOTES

Students should be aware that the actual mean cannot be calculated from a grouped frequency distribution; and that using the midpoint of the class intervals gives the best estimate for the mean

The modal class is found for grouped frequency distributions in which the class intervals are equal

## Y10 Foundation: Topic 27: Information from large data sets

## Objectives:

Prior Knowledge:## Key Vocabulary:

## Differentiation & Extension:

## Using & Applying ideas:

NOTES## Teaching & Learning Resources:

3D Shapes Resources