1. LO: TBAT find measure of location 26/09/16
Title: Averages in grouped data
Q1.
The heights of a number of trees were recorded. Find the Mean, Mode & Median height of trees.
Heights 5 10 15 20
Number of trees 26 17 11 6
Literacy in MATHS
Estimated Mean
Linear Interpolation Method
Class limits/Class Boundaries

2. Q2
The heights of a number of trees were recorded.
a)Find the estimated Mean height of trees.
b) Find the modal class of height of trees.
c) Find the median from the table below.
Heights
0-5
6-10
11-15
16-20
Number of trees 26 17 11 6

3. Interpolation is a means of determining the value of an unknown data point based on the values of known surrounding data points