Скачать или смотреть GCSE Averages in Seconds using Casio FX991EX Classwiz Calculator | Mathinar

In this video we look at how to answer GCSE Average questions using the Casio FX991EX Classwiz calculator.

There are three types of average question you are likely to be asked:
(1) Find the mean of a set of values
(2) Find the mean of a frequency table
(3) Find the mean of a grouped frequency table
In this video we go through all three so feel free to use the chapters to skip to the relevant part of the video.

Finding averages from a grouped frequency table is a question that is almost guaranteed to come up this year and is usually worth 4 marks. You can use your calculator to check that you have done your working correctly in the exam.

Chapters
0:00 Introduction
0:23 Get your calculator in the right mode
1:14 (Type 1) Finding the mean of individual data values
5:53 (Type 2) Finding the mean of a frequency table
7:55 (Type 3) Finding the mean of a grouped frequency table

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