Transcript TwMM 5.1 Relation. in Categorical Data.pptx

Math CC7/8 – Be Prepared
On Desk:
Learning Log:
1. Pencil
2. Calculator
3. Math Journal
4. TwMM Learning Log
1. HW: TWMM Unit Review
2. TwMM Unit Test - Thursday
Tasks for Today
• Warm Up – Writing equations
• Lesson 5.1 – Relationships in
Categorical Data
Warm Up
Write an equation for a line passing through the
points (0, 3) and (4, 6). Show work.
Total
105
35
Discuss as a group –
write your thoughts
down.
Equally likely! 3/7 or 43% of each
False!
prefer wood.
False! Equally likely! 57% of each prefer steel.
Total
60
80
Total
105
35
Discuss as a group – write
your thoughts down.
True!
60/80 = 3/4
False!
Equally likely… 4/7 of each
age group prefer steel frame
False!
Equally likely… 3/7 of each age group
prefer wood frame
You should expect the same proportional
distribution of preferences…
Under 40
Wood
40 or older
Wood
So,
4
7
45
=
105
15
35
3
7
3
7
3
=
7
3
7
of 210 = 90 older riders (wood)
of 420 = 180 younger riders (wood)
of the total will prefer the steel coaster.
4
7
of 420 =
360 total
steel riders
Based on the data, more people of all ages prefer steel
over wood-frame coasters.
It might also be a positive attraction to have a wood-frame
coaster as something unique compared to other parks.
Begin TwMM Unit Review
• Complete it as homework
• Bring it to class tomorrow
• We will correct and discuss during class
• TwMM Unit Test – Thursday!