Statistics
Estimating The Mean Of Grouped Data
We can gain a better understanding of a data set by locating the middle or centre of the data and measuring the spread. Knowing one of these without the other is often of little use.
The mean of a data set is usually calculated by adding the individual data together and then dividing by how many data points there were. This however is tricky to do when the individual data points are not known as it has been grouped into intervals. This is where we have to estimate the mean of the data.
The mean of a data set is usually calculated by adding the individual data together and then dividing by how many data points there were. This however is tricky to do when the individual data points are not known as it has been grouped into intervals. This is where we have to estimate the mean of the data.