Exam (elaborations)
Basics + Summary Statistics with complete solution
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Basics + Summary Statistics with complete solution
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Basics+
Summary
Statistics
Individuals
-
correct
answer-Objects
or
units
described
by
a
set
of
data;
aka
subjects
Variables
-
correct
answer-Any
1
characteristic
of
an
individual.
Can
take
different
values
for
different
individuals
Population
-
correct
answer-The
entire
group
of
subjects
Sample
-
correct
answer-A
subgroup
of
subjects
within
a
population
Sample
size
-
correct
answer-Number
of
individuals
in
a
sample
Parameter
-
correct
answer-Numerical
measurement
that
describes
a
characteristic
of
a
sample
Statistic
-
correct
answer-Numerical
measurement
that
describes
a
characteristic
of
a
sample
Simple
random
sample
-
correct
answer-Every
member
of
a
population
has
an
equal
chance
of
being
selected
in
the
sample
Quantitative
-
correct
answer-Numerical
observation
Qualitative
or
categorical
-
correct
answer-Non-numerical
observations
Discrete
variable
-
correct
answer-Has
finite
number
of
values
Continuous
variable
-
correct
answer-Can
theoretically
take
on
any
value
in
a
range
Histogram
-
correct
answer-Can
be
used
to
represent
continuous
data,
similar
to
bar
chart
but
represents
a
range
of
values.
Data
segmented
into
classes
Class
width
-
correct
answer-Length
of
intervals
on
a
histogram
Center
-
correct
answer-Represent
typical
data
point
in
sample
(mean,
median)
Spread
-
correct
answer-Degree
to
which
data
are
dispersed
(range)
Shape
-
correct
answer-Data's
distribution
Mean
-
correct
answer-Sum
of
all
data
points/n.
Represented
with
x
bar
for
a
sample,
mu
for
a
population.
Substantially
impacted
by
outliers
Median
-
correct
answer-Point
that
separates
top
half
from
top
half
of
data.
Position
of
median
=
(n
+
1)/2.
Robust
to
outliers
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