Determine
whether
the
following
results
appear
to
have
statistical
significance,
and
also
determine
whether
the
results
have
practical
significance.
Most
people
have
IQ
scores
between
70
and
130.
For
approximately
$39.99,
you
can
purchase
a
PC
or
Mac program
from
HighlQPro
that
is
claimed
to
increase
your
IQ
score
by
10
to
20
points.
The
program
claims
to
be
"the
only
proven
IQ
increasing
software
in
the
brain
training
market,"
but
researchers
could
find
no
substantial
data
supporting
that
claim,
so
suppose
that
in
a
study
of
11
subjects
using
the
program,
the
average
increase
in
IQ
score
is
4
1Q
points.
There
is
a
40%
chance
of
getting
such
results
if
the
program
has
no
effect.
Does
the
1Q-increasing
software
have
statistical
significance?
Yes,
the
software
is
statistically
significant
because
the
results
are
unlikely
to
occur
by
chance.
Yes,
the
software
is
statistically
significant
because
the
results
are
likely
to
occur
by
chance.
No,
the
software
is
not
statistically
significant
because
the
results
are
unlikely
to
occur
by
chance.
v
No,
the
software
is
not
statistically
significant
because
the
results
are
likely
to
occur
by
chance.
Does
the
1Q-increasing
software
have
practical
significance?
v
No,
the
software
is
not
practically
significant
because
the
number
of
IQ
points
gained
is
very
small.
Yes,
the
software
is
practically
significant
because
the
number
of
IQ
points
gained
is
large
enough
to
be
considered
practically
significant.
No,
the
software
is
not
practically
significant
because
the
results
are
likely
to
occur
even
if
the
software
has
no
effect.
Yes,
the
software
is
practically
significant
because
the
results
are
too
unlikely
to
occur
by
chance.
