5:21PM
FriOct
13
=
65%
@m
)
13
of
13
<.
>
pbinom(4,12,.3)-pbinom(1,12,.3)
Determine
P(X
>5)
[1]
0.6386304
'_
P(X
Z;g\
>
1-pbinom(5,12,.3)
[1]0.1178487
Popper
P
]
4
Seventy
percent
of
all
trucks
undergoing
brake
inspgction
ata
certain
ili
nspection.
Consider
a
group
of
15
trucks.
What
is
the
probability
that
between
10
and
12
trucks
inclusively
pass
the
inspection?
P(
b
£
/r
7
\23
(a)
0.5948
b.
0.3887
_
P(XL_._]Q\\_.P(Xé_,q>
c.
0.2186
d.
0.5008
>
pbinom(12,15,.7)-pbinom(9,15,.7)
[1]
0.5947937
e.none
of
these
5.
Find
the
mean
and
standard
deviation
for
the
rv
X
as
described
in
the
problem
above.
_
_
a.Mean
=
10.5,
standard
deviation
=
3.15
IS
('7X
@\l\:ean
=
4.5,
standard
deviation
=
3.15
(S
j
4\75_
(,]\
('5
ean
=
10.5,
standard
deviation
=
1.77
d.Mean
=
4.5,
standard
deviation
=
1.77
>
157
1110.5
e.None
of
these
[>]sqrt(15'.7'.3)
[1]
1.774824
