Transcript TwMM 5.3 Setting up a Two Way Table.pptx

Math CC7/8 – Be Prepared
On Desk:
Learning Log:
1. Pencil
1. HW: p. 122, #18, 28-30
2. Calculator
2. Turn in TwMM books?
3. Math Journal
3. Parent Signatures?
4. TwMM Learning Log
Tasks for Today
• Warm Up – Geometry Review!
• Lesson 5.3 – Setting up 2 Way Tables
Warm Up
Two-Way Table
What’s missing?
p. 118
False!
No Job
15 = 3 = 37.5%
40
8
Job
12 = 3 = 60%
20
5
True!
60% of students with after school jobs have late or missing homework.
(12 out of 20 is more than ½, so more likely)
62.5% is not three
times 40%!
False!
True!
40% on-time homework is less than 62.5%
• Correlation does not measure cause and effect - It measures
association.
• The relative frequencies support the claim that students with
after school jobs are more likely than students without jobs to
have missing or late homework.
• Students with jobs might have other circumstances causing
weaker homework performance – more interested in job than
school, needs to work more hours to help support family, can’t
afford special programs or tutors for school.