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3Thavo §8.2 (A) and §10.2 (B)
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Middelbare school
vwo
Leerjaar 3
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It's so fine that all of you .....
have signed in in LessonUp!
and you are all in Google Classroom too.
Well done.
I hope all are present right now, too.
Slide 1 - Diapositive
A: §8.2 Grouping data
B: §10.2 Altitude
An introduction for Math B pupils follows now!
(Math A pupils, please follow this too.
It only takes a few slides and then I've got an introduction to your paragraph!)
Slide 2 - Diapositive
So the subject for today is: the ALTITUDE (=hoogtelijn).
Of course the Challenge path is your learning path!
Slide 3 - Diapositive
Slide 4 - Diapositive
Comment:
As you see in the Solution of 12bcd, you need:
+ a pencil
+ a geo triangle (straight lines, angle of 40 degrees)
+ a pair of compasses
+ forgetting these things is impossible now, because you are at home!!
Slide 5 - Diapositive
Question: Which basic rule for angles of triangles is used many times here?
Slide 6 - Diapositive
Basic rule angles triangle:
Slide 7 - Carte mentale
Answer:
The 3 angles together are 180 degrees.
Slide 8 - Diapositive
Slide 9 - Diapositive
Homework time for Math B
slides for Pupils Math A come up now !
Math B pupils, Good luck, doing §8.2!
Slide 10 - Diapositive
Math A, §8.2 Grouping data
A few fine points!
+ first a bit of Theory, then
+ 2 questions
Slide 11 - Diapositive
What's the point of 'Grouping data'?
If you have a chaotic heap of numbers, it's hard to see any meaning or structure in it...
Just watch the next slide!
It is from exercise 10, page 15.
Slide 12 - Diapositive
Slide 13 - Diapositive
Pretty chaotic content, isn't it?
The previous slide was about prices of hotel rooms.
By grouping them, these prices make much more sense!
See next slide.
Slide 14 - Diapositive
This is an orderly Grouped Frequency table.
In the next slide, fill in the midpoints of the first 2 classes!
Slide 15 - Diapositive
What are the midpoints of the first 2 classes?
Slide 16 - Carte mentale
Answer:
35 and 45 are the midpoints
Slide 17 - Diapositive
The class with Highest Frequency is the MODAL CLASS.
Write down the modal class in the next slide!
Slide 18 - Diapositive
What is the modal class?
Slide 19 - Carte mentale
Answer: modal class is:
Slide 20 - Diapositive
Slide 21 - Diapositive
The final new thing in § 8.2 is:
calculating the Mean of Grouped data.
Important:
take into account that not every number appears with the same frequency! That's why you have to multiply all numbers by their frequency.
After adding up all those outcomes, divide by the total frequency!
Confused? You won't be after the coming
+ Method and
+ Example!
Slide 22 - Diapositive
Still not quite clear?
Just work your way through § 8.2 and it will become clear.
By participating in the LessonUp you already have some idea of all the content. There will still be more for you to find out, now!
Slide 23 - Diapositive
Homework time
+ Good luck doing §8.2!
+ When you are stuck and the Solutionsbook is not clear enough for you,
+ you know how to contact me (google classroom or also mail) and I will provide you with an explanation as soon as I can. In or outside of the Lesson!
Slide 24 - Diapositive
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