AVERAGES

24 = H in the D

1 / 33

Slide 1: Open question

MathematicsUpper Secondary (Key Stage 4)GCSE

This lesson contains 33 slides, with interactive quizzes and text slides.

Items in this lesson

24 = H in the D

Slide 1 - Open question

28 = D in F

Slide 2 - Open question

7 = W of the W

Slide 3 - Open question

5 = V of the A

Slide 4 - Open question

90 = D in a RA

Slide 5 - Open question

What we will learn today:

What an average is
Everyday uses for averages
How to work out a mean of a set of data
How to work out a median of a set of data
How to work out the mode of a set of data
How to calculate a range and what it shows

Slide 6 - Slide

What is an average?

Slide 7 - Open question

An average is a representative or ‘typical’ value in a set of data.

Slide 8 - Slide

From day 1 you are being measured against an average...

Length

Circumference of head

How old are you when you sit up/crawl/walk/talk

Weight

Slide 9 - Slide

The average person will take .............. steps a day

Slide 10 - Open question

The average person falls asleep in .......... mins

Slide 11 - Open question

The average person laughs ........... times a day

Slide 12 - Open question

When do we use averages day to day?

Slide 13 - Mind map

Slide 14 - Slide

Slide 15 - Slide

Slide 16 - Slide

Slide 17 - Slide

3 Averages:

Mean

Median

Mode

Slide 18 - Slide

Mean

Add up all the numbers and divide by how many numbers there are

Slide 19 - Slide

Best used when:

There are no extreme values

Slide 20 - Slide

The shoe sizes of 10 children in a school are:
5 4 6 5 7 5 2 8 6 12
What is the mean size?

Slide 21 - Open question

The weekly costs of 5 nurseries are:
£150, £180, £130, £190, £160
What is the mean cost?

Slide 22 - Open question

Median

Put your numbers in order

Pick the middle number

If there are 2 numbers in the middle, add them and divide by 2

Slide 23 - Slide

Best for:

When there are extreme values in your data

Slide 24 - Slide

Attendance in a class in your school was the following over one week: 23, 28, 21, 19, 27
What was the median attendance?

Slide 25 - Open question

Here are the total minutes 4 toddlers slept in daycare during the day:
45, 30, 80, 60. What is the median?

Slide 26 - Open question

Mode

The mode is the number/item which occurs the most

Slide 27 - Slide

A class was asked how many messages they think they send on their phone each day:
50, 65, 30, 80, 50, 20, 65, 50, 40 What is the mode?

Slide 28 - Open question

The range is a measurement of how spread out data is.

Range = Highest number - lowest number

Slide 29 - Slide

Maths exam results for a class were:
66%, 85%, 75%, 90%, 40%, 70%
What was the range?

Slide 30 - Open question

Remember this:

Hey diddle diddle,

The median's the middle,

You add then divide for the mean.

The mode is the one you see the most,

and the range is the difference between.

Slide 31 - Slide

I feel confident using averages and range

😒🙁😐🙂😃

Slide 32 - Poll

Slide 33 - Slide