This preview shows pages 1–3. Sign up to view the full content.
Name:
Student ID:
Exam #2 Form A  Statistics 211 Section 505 (Spring 2005)
•
This test consists of six numbered pages. Make sure you have all 6 pages. It is your responsi
bility to inform me if a page is missing!!!
•
You have 70 minutes to complete this test.
•
Make sure you Fll out and “bubble in” the following items on the scantron sheet:
– Last Name, ±irst Name, MI.
– Dept (STAT), Course No (211), Section (505).
– Social Security Number (enter your Student ID).
– Test ±orm (A or B).
– Enter the exam number, sign and date the form.
You
will
loose credit if you fail to Fll out your scantron form correctly.
•
You may use the 6 page crib sheet #2 from the web site, all appropriate tables and a calculator.
•
If I provide partial results—assume they are correct and use them even if they are not.
•
If there is no correct answer or if multiple answers are correct, select the
best
answer.
•
There is no penalty to wrong answers
. . .
so guess if you do not know an answer.
•
It is your responsibility to look at the overhead or blackboard about every 15 minutes and to
incorporate any relevant information into your test.
1
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document Chapter 4
[1]
Suppose
X
∼
N
(
μ
= 50
, σ
2
= 20
2
) and
P
(
X < c

50) = 0
.
5, then
c
is
a) 100
b) 1
.
96
c) 60
d) 50
e) 50 + 1
.
96
×
20
[2]
Suppose
X
has the following
pdf
.
f
(
x
) =
k
x
for 1
< x <
2
.
Then
k
is
a) 1
.
0
b)
∑
x
≤
2
x
×
x/
2
c)
1
log 2
d)
R
2
∞
x
2
/
2
dx
e) None of the above.
[3]
Suppose
X
has the following
pdf
.
f
(
x
) =
x
2
for 0
< x <
2
.
Let
Q
1
be the Frst quartile of the distribution, then
a)
Q
1
=
√
5
b)
R
Q
1
0
x/
2
dx
= 0
.
25
c)
R
Q
1
0
x
2
/
2
dx
= 0
.
25
d)
R
Q
1
∞
x/
2
dx
= 0
.
5
e) None of the above.
[4]
This is the end of the preview. Sign up
to
access the rest of the document.
This note was uploaded on 09/06/2008 for the course STAT 211 taught by Professor Parzen during the Spring '07 term at Texas A&M.
 Spring '07
 Parzen
 Statistics

Click to edit the document details