Question
16
1/
1
point
The
time
a
student
sleeps
per
night
has
a
distribution
with
mean
6.3
hours
and
a
standard
deviation
of
0.6
hours.
Find
the
probability
that
average
sleeping
time
for
a
randomly
selected
sample
of
42
students
is
more
than
6.5
hours
per
night.
Answer:
(round
to
4
decimal
places)
0.0154
v
w
Hide
question
16
feedback
New
SD
=
.6/SQRT(42)
P(x
>
6.5),
in
Excel
=1-NORM.DIST(6.5,6.3,0.092582,TRUE)
Question
17
1/
1
point
The
time
a
student
sleeps
per
night
has
a
distribution
with
mean
6.1
hours
and
a
standard
deviation
of
0.6
hours.
Find
the
probability
that
average
sleeping
time
for
a
randomly
selected
sample
of
36
students
is
more
than
6
hours
per
night.
Answer:
(round
to
4
decimal
places)
0.8413
v