Book a Demo
Topics
P
o
p
u
l
a
t
i
o
n
s
a
n
d
S
a
m
p
l
e
s
S
a
m
p
l
i
n
g
a
n
d
b
i
a
s
(
I
n
v
e
s
t
i
g
a
t
i
o
n
)
M
i
s
l
e
a
d
i
n
g
v
i
e
w
e
r
s
(
I
n
v
e
s
t
i
g
a
t
i
o
n
)
F
e
a
t
u
r
e
s
o
f
P
o
p
u
l
a
t
i
o
n
s
a
n
d
S
a
m
p
l
e
s
T
a
r
g
e
t
P
o
p
u
l
a
t
i
o
n
E
s
t
i
m
a
t
i
n
g
P
o
p
u
l
a
t
i
o
n
S
i
z
e
f
r
o
m
S
a
m
p
l
e
P
o
p
u
l
a
t
i
o
n
s
a
n
d
S
i
m
p
l
e
R
a
n
d
o
m
S
a
m
p
l
e
s
E
X
T
:
V
a
r
i
a
b
i
l
i
t
y
o
f
S
a
m
p
l
e
s
f
r
o
m
D
i
s
t
r
i
b
u
t
i
o
n
s
E
X
T
:
S
a
m
p
l
e
P
r
o
p
o
r
t
i
o
n
s
(
c
a
l
c
u
l
a
t
i
n
g
a
n
d
c
o
m
p
a
r
i
s
o
n
)
E
X
T
:
T
h
e
E
x
a
c
t
D
i
s
t
r
i
b
u
t
i
o
n
o
f
t
h
e
S
a
m
p
l
e
P
r
o
p
o
r
t
i
o
n
s
Lesson
Practice
E
X
T
:
T
h
e
A
p
p
r
o
x
i
m
a
t
e
N
o
r
m
a
l
D
i
s
t
r
i
b
u
t
i
o
n
o
f
t
h
e
S
a
m
p
l
e
P
r
o
p
o
r
t
i
o
n
s
C
o
n
f
i
d
e
n
c
e
I
n
t
e
r
v
a
l
s
M
a
r
g
i
n
s
o
f
E
r
r
o
r
A
p
p
l
i
c
a
t
i
o
n
s
o
f
C
o
n
f
i
d
e
n
c
e
I
n
t
e
r
v
a
l
s
Log in
Sign up
Book a Demo
Canada
ON
Grade 12
EXT: The Exact Distribution of the Sample Proportions
What is Mathspace
About Mathspace
