Key learning points

1. The mean is a measure of central tendency.
2. The mean can only be estimated with a grouped frequency table.
3. Calculating this from a grouped frequency table may be easier when the data is very large.

Keywords

• Frequency - The frequency is the number of times an event occurs; or the number of individuals (people, animals etc.) with some specific property.

• Interval - An interval is all the values between two points. e.g. 4 < x ≤ 10

Common misconception