Extra help
Help session tonight 3:30 to 5pm GRIS274 (me)
Help session tonight 6 7:30 in GRIS 276 (Leon Zeng)
Spring 2008 IE330
True/False problems
(True or False) is defined as the probability that a type I
error could be made.
(True or False) is defi

Name: _
3 February 2010
IE330 Spring 2010
Quiz #2c KEY
Confidence intervals
x z /2 / n
( n 1) s 2 2 ( n 1) s 2
2
2
x t / 2,n 1s / n
/2,n 1
1 / 2,n 1
p z / 2
Single sample tests
X 0
Z0 =
/ n
X 0
T0 =
s/ n
( n 1) S 2
=
2
2
0
0
Z0 =
X np0
np0 (1 p0 )
p (1-

Name: _
3 February 2010
IE330 Spring 2010
Quiz #2b KEY
Confidence intervals
x z /2 / n
( n 1) s 2 2 ( n 1) s 2
2
2
x t / 2,n 1s / n
/2,n 1
1 / 2,n 1
p z / 2
Single sample tests
X 0
Z0 =
/ n
X 0
T0 =
s/ n
( n 1) S 2
=
2
2
0
0
Z0 =
X np0
np0 (1 p0 )
p (1-

Name: _
3 February 2010
IE330 Spring 2010
Quiz #2a Key
Confidence intervals
x z /2 / n
( n 1) s 2 2 ( n 1) s 2
2
2
x t / 2,n 1s / n
/2,n 1
1 / 2,n 1
p z / 2
Single sample tests
X 0
Z0 =
/ n
X 0
T0 =
s/ n
( n 1) S 2
=
2
2
0
0
1
Z0 =
X np0
np0 (1 p0 )
p (1

25 January 2010
IE330 Spring 2010
Quiz #1c
1. Which of the following is not a measure of location?
a. Mean
b. Variance
c. Median
d. Quartile
2. Suppose I will choose a number at random from a standard normal distribution.
(Call that number x.) Which of th

Name: _
25 January 2010
IE330 Spring 2010
Quiz #1b
1. You work in a plant that produces titanium rods used to treat patients with severe
limb injuries, such as a broken leg. The rods under production are supposed to be
500mm long. To see if the rods being

Name: _
25 January 2010
IE330 Spring 2010
Quiz #1a
Match the definitions with the symbols listed below:
1.
2.
3.
4.
e. 2
d.
f. s 2
c. x
Population variance
A parameter
Sample variance
Sample mean
a.
e. 2
i. s
m.
b.
f.
j.
n.
s2
x
x2
d.
h. s 2
l. s
p. x

Name: _
30 January 2009
IE330 Spring 2009
Quiz #2c
Possibly helpful confidence interval formulae:
x z / 2
( n 1) s 2 2 ( n 1) s 2
x + z / 2
n
n
x t / 2,n 1
s
s
x + t / 2,n 1
n
n
2
/ 2,n 1
p z / 2
2
1 / 2, n 1
p (1- p )
p p + z / 2
n
p (1- p )
n
Name:

Name: _
30 January 2009
IE330 Spring 2009
Quiz #2b
Possibly helpful confidence interval formulae:
x z / 2
( n 1) s 2 2 ( n 1) s 2
x + z / 2
n
n
x t / 2,n 1
s
s
x + t / 2,n 1
n
n
2
/ 2,n 1
p z / 2
2
1 / 2, n 1
p (1- p )
p p + z / 2
n
p (1- p )
n
Name:

Name: _
30 January 2009
IE330 Spring 2009
Quiz #2a
Possibly helpful confidence interval formulae:
x z / 2
( n 1) s 2 2 ( n 1) s 2
x + z / 2
n
n
x t / 2,n 1
s
s
x + t / 2,n 1
n
n
2
/ 2,n 1
p z / 2
2
1 / 2, n 1
p (1- p )
p p + z / 2
n
p (1- p )
n
Name:

Name: _KEY_
23 January 2009
IE330 Spring 2009
Quiz #1c
Match the definitions with the symbols listed below:
1.
2.
3.
4.
Estimate of an unspecified population parameter
_ g. _
Population mean
Estimate of population standard deviation
_
_ f. s 2 _
_ m.
Sam

Name: _KEY_
23 January 2009
IE330 Spring 2009
Quiz #1b
Match the definitions with the symbols listed below:
1.
2.
3.
4.
_
s _
_ l.
_ e. 2 _
_ d. _
Estimate of population mean
_ k.
Sample standard deviation
Population variance
An unspecified population pa

Name: _KEY_
23 January 2009
IE330 Spring 2009
Quiz #1a
Match the definitions with the symbols listed below:
1.
2.
3.
4.
Sample mean
Population standard deviation
Estimate of population variance
_ c. x _
_ a. _
_ o. 2 _
Estimate of an unspecified populatio

Name: _
17 February 2006
IE330 Spring 2006 Closed book, closed notes, no calculators
Quiz #4 (continued on back side make sure you answer all 7 questions)
1. If the test statistic for a hypothesis test of the differences of two means is the
following, the

Name: _
8 February 2006
IE330 Spring 2006 Closed book, closed notes, no calculators
Quiz #3 (continued on back side make sure you answer all 8 questions)
1. Choose the most correct interpretation for a 95% confidence interval on a mean.
a. It is the inter

Name: _
27 January 2006
IE330 Spring 2006
Quiz #2
Match the definitions with the symbols listed below:
1. Write the symbol for the population mean _
2. Write the symbol for the sample variance _s2_
3. Imagine that we take a sample of 100 rivets and classi

18 January 2006
IE330 Spring 2006
Quiz #1
Match the definitions with the symbols listed below:
1.
2.
3.
4.
5.
6.
7.
8.
Population mean
Estimate of population mean
Population standard deviation
Sample variance
Population variance
Estimate of population var

Name: _KEY_
26 September 2008
IE330 Fall 2008
Closed book, closed notes, no calculators
Quiz #3c (see tables and helpful formulae on the back page)
1. If the two-sided 95% confidence interval on a mean is [0, 10.6], which of the
following can we say are t

Name: _KEY_
26 September 2008
IE330 Fall 2008
Closed book, closed notes, no calculators
Quiz #3b (see tables and helpful formulae on the back page)
1. (TRUE or FALSE) The probability of a Type II error is equal to 1 - .
2. If the two-sided 95% confidence

Name: _
26 September 2008
IE330 Fall 2008
Closed book, closed notes, no calculators
Quiz #3a (see tables and helpful formulae on the back page)
1. (TRUE or FALSE) A 95% confidence interval on a mean is the interval around
our sample mean within which ther

Name: _
17 September 2008
IE330 Spring 2008
Test 1b
No calculators, closed book, closed notes.
Do not tear off any pages.
Once you are finished, turn in the test and leave quietly.
1 of 10
Name: _
1. Which of the below is the proper definition of ?
a. P(R