CHAPTER 7 Notes to the Instructor: The normal probability plots are constructed in Minitab using the command Normality Test under Basic Statistics. The analysis of variance is carried out using ANOVA under Stat in Minitab. In cases where there are exactly
Section 3-10 3-127. a) E(X) = 300(0.4) = 120, V(X) = 300(0.4)(0.6) = 72 and
X = 72 .
100.5 120 = P ( Z 2.30) = 0.010724 Then, P ( X 100) P Z 72
b)
79.5 120 99.5 120 = P( 4.77 < Z 2.42) P (80 X < 100) P Z < 72 72 = 0.007760 - 0 = 0.007760
c)
130.5 120
Chapter 3 Section 3-2 3-1. Continuous 3-2. Discrete 3-3. Continuous 3-4. Discrete 3-5. Discrete 3-6. Continuous 3-7. Discrete 3-8. Continuous 3-9. Continuous Section 3-3 3-10. a) Engineers with at least 36 months of full-time employment. b) Samples of cem
IEE 380 Summer 2009 Quiz #14A
Name: _
Question 1. A 22 design of an experiment is set up as follows. The entries are a measure of warping on a copper plate. What are the hypotheses test(s) being done? Use words in H0 and H1.
Temp 50C 100C Copper Content 4
IEE 380 Summer 2009 Quiz #13A
Name: _
Question 1. A quality assurance engineer would like to fit a multiple regression model to the following data. The bearing wear is the dependent variable is and the independent variables are oil viscosity and load
Bear
IEE 380 Summer 2009 Quiz #12A
Name: _
An article in the Materials Research Bulletin (Vol. 26, No. 11, 1991) reported a study of four different methods of preparing the superconducting compound PbMo6S8. The authors contend that the method of preparation af
IEE 380 Summer 2009 Quiz #11A
Name: _
One-hundred men were asked if they would vote for Candidate A; sixty-five of these men said they would. Two-hundred women were asked if they would vote for Candidate A; ninety-four of these women said they would. Usin
IEE 380 Summer 2009 Quiz #10A
Name: _
The times between two consecutive arrivals to an ATM machine have a pdf that is exponential with a mean of 5 minutes. What is the probability that the time between two consecutive arrivals is less than 10 minutes? You
IEE 380 Summer 2009 Quiz #9A
Name: _
In a poll of 50 people, 12 said that they would vote for Candidate A over Candidate B in an election. Is there evidence that the proportion of people voting for Candidate A is not .25? Clearly state your conclusion and
IEE 380 Summer 2009 Quiz #8A
Name: _
1. The time between arrivals of customers to an ATM, T ,is a random variable that is known to be exponentially distributed with a mean of hour. Show the pdf of T (equation, not graph).
f (t ) = 2e 2t
for t > 0
2. A cer
IEE 380 Summer 20091 Quiz #3
Name: _
An particular resistor has a probability of .2 of being failed by an inspector. An inspector either passes or fails an item. Four items are inspected. What is the probability that at least 2 of these items are passed?
IEE 380 Summer 20091 Quiz #2
Name: _
Given the following probability mass function of X, graph the CDF of X. Label your axes and show all relevant values. Dont forget your arrows, too.
1 x p( x) = for x = 1, 2, 3, 4 2 5
F(x) 1 6/10 3/10 1/10
1
2
3
4
x
I
IEE 380 Summer 2009 Quiz #1 3-17, 3-18
Name: _
X is the number of bars of service on your cell phone. The probability mass function of X is as follows: p(x) = .05 = .15 = .15 = .25 = .20 = .20 x=0 x=1 x=2 x=3 x=4 x=5
What is the probability that you have
IEE 380 Summer 2009 Quiz #7A
Name:_
The time to complete a manual task in a manufacturing operation is considered to be a normally distributed random variable with known standard deviation of .05 minutes. A sample of 5 is taken: .49 min, .52 min, .50 min,
IEE 380 Summer 2009 Quiz #6A
Name:_
The time to complete a manual task in a manufacturing operation is considered to be a normally distributed random variable with mean .50 minutes and standard deviation of .05 minutes. A sample of 49 is taken. What is th
IEE 380 Summer 2009 Quiz #5A
a. Find a such that P(a < Z < .11) = .410295
Name:_
(.11) (a) = .410295 (a) = .133500, so a = -1.11
-(a) = .410295 - (.11) = .410295-.543795
b. X is the number of calls coming into a Verizon help center per hour. X is known to
IEE 380 Summer 2009 Quiz #4A
Name:_
32 x for -1 < x < 1 is a valid probability 2
a. Using calculus (not your calculator) show that f ( x) =
density function.
3 3 f ( x)dx = x 2 dx = x 3 = 1 2 6 -1 x = 1 x = 1
1
1
1
b. What is the probability that X = ? 0,
Statistical Process Control Chapter 8
1
Quality means.
Quality means:
Fitness for use Design integrity Conformance to specifications
Quality improvement means:
Reducing variability in products and processes
Almost every company has either a quality c
Decision Making for Two Samples
Chapter 5
Sections 5-1 through 5-4
2
True Story
In the 1980s, the Hughes Aircraft Co. (HAC) bought cryogenic coolers for their Bradley Fighting Vehicle night vision assemblies from two different vendors: Hughes Aircraft Co
Decision Making for a Single Sample
Chapter 4
Sections 4-1 through 4-4
I will not be covering sections 4-1 through 4-4 in strict order
2
Statistical Inference
Statistical Inference uses methods to determine information about a population based upon data
Chapter 3
s
Random Variables and Probability Distributions
Sections 3-1 through 3-3
2
Definition: Random Variable
s
Random variable:
A variable whose measured value can change
s
Some examples:
Number of students taking IEE 380 from semester to semester