Cette leçon contient 25 diapositives, avec quiz interactifs et diapositives de texte.
La durée de la leçon est: 50 min
Éléments de cette leçon
Slide 1 - Diapositive
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 - Diapositive
Entry ticket
Slide 3 - Diapositive
What's the mean?
A
1,9
B
2,0
C
1,8
D
0,4
Slide 4 - Quiz
Entry ticket - solution
Slide 5 - Diapositive
§2.5 Stem-and-leaf diagram
So more on 'Statistics'.
Is this everybody's cup of tea?!
Slide 6 - Diapositive
First a short Refresh on §2.4 Mean, mode and median.
The MEAN follows in the next slide.
Slide 7 - Diapositive
Slide 8 - Diapositive
Slide 9 - Diapositive
Slide 10 - Diapositive
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 - Diapositive
Slide 12 - Diapositive
Josh uses an even clearer way.
Try to understand what he he has done!
Slide 13 - Diapositive
Slide 14 - Diapositive
Task: What percentage of the pupils is shorter than
160 cm? There are 40 pupils. ANS
timer
1:30
Slide 15 - Diapositive
.... % is shorter than 160 cm
Slide 16 - Carte mentale
Solution:
Slide 17 - Diapositive
Another Solution: 5/40 x 100 % = 1/8 x 100 % = 12.5 %
So you can also do it without a ratio table!
Slide 18 - Diapositive
In the next example Josh's method is used again.
You also get an explanation about it!
Slide 19 - Diapositive
Slide 20 - Diapositive
Slide 21 - Diapositive
Slide 22 - Diapositive
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 - Diapositive
Short addition:
For comparing two groups of data there is a
special stem-and-leaf diagram!
See next slide.
Slide 24 - Diapositive
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.