2TH §2.5 Stem+Leafdiagram

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Slide 1: Tekstslide
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In deze les zitten 25 slides, met interactieve quizzen en tekstslides.

time-iconLesduur is: 50 min

Onderdelen in deze les

Slide 1 - Tekstslide

Plan for today
  • Entry ticket
  • §2.5 Stem and Leaf diagram
  • Homework: Exercises S27, 27, 28, 29, 30


Learning goal: You will learn what a stem and leaf diagram is

Slide 2 - Tekstslide

Entry ticket

Slide 3 - Tekstslide

What's the mean?
A
1,9
B
2,0
C
1,8
D
0,4

Slide 4 - Quizvraag

Entry ticket - solution

Slide 5 - Tekstslide

§2.5 Stem-and-leaf diagram
So more on 'Statistics'.
Is this everybody's cup of tea?!

Slide 6 - Tekstslide

First a short Refresh on §2.4 Mean, mode and median.
The MEAN follows in the next slide.

Slide 7 - Tekstslide

Slide 8 - Tekstslide

Slide 9 - Tekstslide

Slide 10 - Tekstslide

We do 26 together now:
Sophie has measured the lengths of 40 pupils.
But she's doesn't have a good overview yet.
She wants to order all these lengths in a better way.
See next slide.

Slide 11 - Tekstslide

Slide 12 - Tekstslide

Josh uses an even clearer way.
Try to understand what he he has done!

Slide 13 - Tekstslide

Slide 14 - Tekstslide

Task:  What percentage of the pupils is shorter than 
160 cm? There are 40 pupils.   ANS
timer
1:30

Slide 15 - Tekstslide

.... % is shorter than 160 cm

Slide 16 - Woordweb

Solution:

Slide 17 - Tekstslide

Another Solution:         5/40 x 100 % = 1/8 x 100 % = 12.5 %
So you can also do it without a ratio table!


Slide 18 - Tekstslide

In the next example Josh's method is used again.
You also get an explanation about it!

Slide 19 - Tekstslide

Slide 20 - Tekstslide

Slide 21 - Tekstslide

Slide 22 - Tekstslide

Homework  
  • Do and correct the following exercises S27, 27, 28, 29, 30 
  • Correct your answers with a another colour 
  • Send in your pictures in GC
  • Later this lesson there is a short addition to this Lessonup.

Slide 23 - Tekstslide

Short addition:
For comparing two groups of data there is a 
special stem-and-leaf diagram!
See next slide.

Slide 24 - Tekstslide

Double stem-and-leaf diagram
If you want to compare two groups. The stem is then placed between two vertical lines and the data for one group is place in the leaves on the left and for the other group in the leaves on the right.

When sorting the leaves,
the smallest number is written
closest to the stem.

Slide 25 - Tekstslide