# WALT: find the mean, median and mode from a frequency table

```WALT: find the mean, median and mode
from a frequency table (Grade D/C)
Can you guess the English version of these mathematical words?
frecuenci modd
a
moyen terme
número durchschnitt
airmheán
10 Quick
Questions
Reviewing
Higher
Topics
-In Pairs!
Question 1...
Write the prime factors of 160.
Question 2...
Order the following from smallest to largest.
0
8
,6
−1
,
1
4
, 16
1
2
Question 3...
Given that 6.3 × 2.7 = 17.01 work out:
63 × 27
b) 630 × 2.7
a)
Question 4...
Write 1.25 × 10−7 as a regular
number.
Question 5...
2
3
Work out the value of 8
Question 6...
Expand  + 3 2 + 3 .
Question 7...
Factorise  2 + 5 + 6.
Question 8...
Factorise  2 − 64.
Question 9...
Change the subject of this
formula to .
4 +
=
2
Question 10...
Write down all the possible integer
values of  in these inequalities.
−3 <  ≤ 5
This lesson…
 We
are going to review how to analyse data using
a frequency table.
To succeed: you will know how to find the mean and
mode from a grouped frequency table.
To excel: you will know how to find the class that
contains the median from a grouped frequency
table.
Challenge: to use a frequency table to present the
data in a cumulative frequency diagram.
It’s the year 2033…
…and how exciting! It’s our 20year 11S-Ma2 class reunion!
Many of you have careers, spouses and childrenwhich means a lot of data for me! 
Being the extremely cool mathematician that I am
I decide to analyse some of this data.
First, I want to find out the average number of
children that my students have had.
Next, I would like to find out the
average age of the children.
What makes analysing this data
more difficult?
Try it!
 Each
of you has a number 1-3.
 You
must group yourself so you have 1 of
each number.
Together, try and answer the exam
question on finding averages from a
frequency table.
Question 1- 3 marks
Question 2- 5 marks
Try it yourself…
```

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