Transcript Math 8 Review

Please have the homework
out on your desk.
Grab a packet from the front
and wait for instructions.
Math 8 Review
Sampling, Measures of Central
Tendency & Scatter Plots
Which color is represents the Mode? Why?
O
w
n
e
r
s
Car Colors
What Type of Sampling is it?
Convenience
Systematic
Voluntary
Random
Nick will survey the students that sit at his
lunch table.
You want to make your parents believe you are doing well
in all of your classes, should you tell them the mean,
median or mode of your grades?
Report Card
Science
71
Math
97
Athletics
94
LA
75
History
85
Spanish
65
What Type of Sampling is it?
Convenience
Systematic
Voluntary
Random
Mr. Harold counts off his students as they
enter the room, 1—2—3. All of the 3s will
be surveyed.
Positive, negative or no trend?
T/F
•
As TV time decreases,
so does the math score.
2. More TV time causes a
higher math score.
T
V
M
i
n
u
t
e
s
Is the trend positive, negative or no trend?
T/F?
As temperature
increases, ice cream
sales increase.
I
c
e
C
r
e
a
m
Temperature
What Type of Sampling is it?
Convenience
Systematic
Voluntary
Random
Students are asked to go online and
complete a serve in their free time.
A teacher asked her class, “How many pets
do you have?” She recorded…
number
of pets
0
1
2
3
4
5
number
of students
1
6
1
3
5
2
Which measure of data
should she use if she wants
to show students do not
have many pets?
What Type of Sampling is it?
Convenience
Systematic
Voluntary
Random
Susan and George will roll a dice to choose
numbers assigned to students and they
will take the survey.