Learning goal: You will learn what a stem and leaf diagram is
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Slide 1: Tekstslide
WiskundeMiddelbare schoolhavo, vwoLeerjaar 2
In deze les zitten 24 slides, met interactieve quizzen en tekstslides.
Lesduur is: 50 min
Onderdelen in deze les
Plan for today
Entry ticket
§2.5 Stem and Leaf diagram
Homework: Exercises 27, 28, 29, 30, C7
Learning goal: You will learn what a stem and leaf diagram is
Slide 1 - Tekstslide
Entry ticket
Slide 2 - Tekstslide
What's the mean?
A
1,9
B
2,0
C
1,8
D
0,4
Slide 3 - Quizvraag
Entry ticket - solution
Slide 4 - Tekstslide
§2.5 Stem-and-leaf diagram
So more on 'Statistics'.
Is this everybody's cup of tea?!
Slide 5 - Tekstslide
First a short Refresh on §2.4 Mean, mode and median.
The MEAN follows in the next slide.
Slide 6 - Tekstslide
Slide 7 - Tekstslide
Slide 8 - Tekstslide
Slide 9 - 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 10 - Tekstslide
Slide 11 - Tekstslide
Josh uses an even clearer way.
Try to understand what he he has done!
Slide 12 - Tekstslide
Slide 13 - Tekstslide
Task: What percentage of the pupils is shorter than
160 cm? There are 40 pupils. ANS
timer
1:30
Slide 14 - Tekstslide
.... % is shorter than 160 cm
Slide 15 - Woordweb
Solution:
Slide 16 - Tekstslide
Another Solution: 5/40 x 100 % = 1/8 x 100 % = 12.5 %
So you can also do it without a ratio table!
Slide 17 - Tekstslide
In the next example Josh's method is used again.
You also get an explanation about it!
Slide 18 - Tekstslide
Slide 19 - Tekstslide
Slide 20 - Tekstslide
Slide 21 - Tekstslide
Homework
Do and correct the following exercises 27, 28, 29, 30, C7
Correct your answers with another colour
Later this lesson there is a short addition to this Lessonup.
Slide 22 - Tekstslide
Short addition:
For comparing two groups of data there is a
special stem-and-leaf diagram!
See next slide.
Slide 23 - 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.