Question

A biologist takes a sample of 100 grass plants to measure stem length. The following data were obtained: Length (cm) Frequency 226 927 1028 1229 2030 1931 1332 15Calculate the mean length per stem.

Answer 1

To get FX

Length Times Frequency

Let's sum all the FX together

`\begin{gathered} \Sigma fx=2923 \\ \\ \end{gathered}`

Average, also called the arithmetic mean, is the sum of all the values divided by the number of values. Whereas, mean is the average in the given data. In statistics, the mean is equal to the total number of observations divided by the number of observations (total frequency).

`\text{Mean = }(2923)/(100)=29.23`