STAT 3115 Homework #7
Due Date: Thursday, July 13rd, Beginning of Class
Note: Please include the following information on the first page of your completed homework.
1. Your name
2. STAT 3115
3. Homework #7
4. Due Date
5. List of students you worked with o
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STAT 3115 Homework 1 Solutions
1. (a) The population of interest is all S&T employees.
(b) Variables include:
Lot letter: Categorical
Distance: Quantitative
Satisfaction: Categorical
(c) Conducting a census would require information from every employee
STAT 3115 Homework #3 - SOLUTIONS
Section 3.1 Problems
2. Answers will vary. Some possibilities include:
X = 1 if a randomly selected book is non-fiction and X = 0 otherwise
X = 1 if a randomly selected executive is a female and X = 0 otherwise
X = 1 if a
STAT 3115 Homework #7 - SOLUTIONS
Section 5.4 Problems
46.
X is a random variable with: = 12 cm and = .04 cm.
a. n = 16, the sampling distribution of X is centered at: E ( X ) 12 cm and
SD( X )= x
n
.04
.01 cm .
4
b. n = 64, the sampling distribution of
STAT 3115 Homework #6 - SOLUTIONS
Section 5.1 Problems
1.
a. P(X = 1, Y = 1) = p(1,1) = .20
b. P(X 1 and Y 1) = p(0,0) + p(0,1) + p(1,0) + p(1,1) = .42
c. At least one hose is in use at both islands. P(X 0 and Y 0) = P(X 1 and Y 1) =
p(1,1) + p(1,2) + p(2
Stat MiniTab Assignment 6
MA6_1
1. We are told that 40% of the population has type A blood. A blood bank recently took a random sample
of 150 recent donations. The sample revealed 72 had type A blood. Does this suggest the actual percentage of type A pers
Stat MiniTab Assignment 4
MA4_1
1a.
(The regression equation is
Tuition (in thousands) = 4.647 + 1.006 Year After 1981
S = 0.282670
R-Sq = 99.2%
R-Sq(adj) = 99.1%
Analysis of Variance
Source
Regression
Error
Total
DF
1
8
9
SS
83.4276
0.6392
84.0668
MS
83.
CHAPTER 1:
SAMPLING AND
DESCRIPTIVE STATISTICS
SECTION 1.1:
SAMPLING
Definitions
Population: is the entire collection of objects or outcomes
(elements) about which information is sought.
The number of elements in the population is denoted by N.
Sample:
SECTION 1.2 (PART 2):
SUMMARY STATISTICS
Practice:
1. A researcher randomly sampled six observations from a
population, and he got the following information:
2 = 45263
= 485,
=1
=1
Compute the sample mean and standard deviation.
2. A professor scaled (cu
SECTION 1.3 (PART 2):
GRAPHICAL SUMMARIES
3. Histograms:
is a graph (vertical bar) that gives an idea of the shape of a sample.
Summarize large data sets graphically.
Indicate regions where samples are concentrated and regions where
the are sparse.
To
SECTION 1.2 (PART 1):
SUMMARY STATISTICS
Practice:
1. Identify the population and the sample:
a. A survey of 1378 American households found that 37%
of the households own a computer.
b. A survey of 2625 elementary school children found that 28%
of the chi
Fall 2016
STAT 3113 Applied Engineering Statistics
Exam 1 Review Solutions
1. A and B are two events such that P(A) = 0.3, P(B) = 0.5, and P(AB) = 0.65. Which of
the following statements is true:
A and B are independent events. ( ) = 0.15 = (). ()
2. What
Example:
Suppose you toss a coin three times.
1. How many outcomes are in the sample space?
2. Describe the sample space.
3. List all outcomes in the event A that all the outcomes are the same, and find
P(A)?
4. What is the probability that all the outcom
1. If (/) = 0.7, () = 0.5 and () = 0.2. Determine (/)?
a. 0.28.
b. 0.14.
c. 0.35.
d. 0.10.
2. A researcher divides the population of product users into three groups based
on degree of use. If the researcher then draws a random sample from each user
group
1. a. (/) =
()
()
=
0.14
0.5
=0.28.
b. Stratified random sample.
960 = 96.
c. 9=1 = (95)(9) = 855, 10
=1 = 855 + 105 = 960, =
10
2.
a. Number of elements in the sample space = 33 = 27.
S = cfw_RRR, RRL, RLR, LRR, RRS, RSR, SRR, RLL, LRL, LLR, RSS, SRS,
S
Fall 2016
STAT 3113 Applied Engineering Statistics
Exam 1 Review
1. A and B are two events such that P(A) = 0.3, P(B) = 0.5, and P(AB) = 0.65. Which
of the following statements is true:
a. A and B are mutually exclusive events.
b. A and B are dependent ev
STAT 3115 Homework # 3 - Solutions
Section 2.3 Problems
1- # 30 (book)
2-
3-
4Let B denote the blue sock and W denote the white sock.
Section 2.4 Problems
5- # 49 (book)
6- # 59 (book)
The required probabilities appear in the tree diagram.
7- # 60 (book)
STAT 3115 Homework #2 - SOLUTIONS
Section 2.1 Problems
1- Resistors
a.
b.
c.
d.
e.
S=cfw_(0,0), (0,1), (0,2), (1,0), (1,1), (1,2), (2,0), (2, 1), (2,2), (3,0), (3,1), (3,2)
C=cfw_(0,0), (0,1), (0,2)
D=cfw_(0,1), (0,2), (1,2)
C D =cfw_(0,0), (0,1), (0,2),(
STAT 3115 Homework #1 SOLUTIONS
1.
a. The population of interest is all Rolla residents (well, technically we are probably only
interested in all of the voting-eligible residents for this survey).
b. An individual is one resident.
c. Variables mentioned a
STAT 3115 Homework #2
Due Date: Friday February 3th, Beginning of Class
Note: Please include the following information on the first page of your completed homework.
1. Your name
2. STAT 3115
3. Homework #2
4. Due Date
5. List of students you worked with o
STAT 3115 Homework #1
Due Date: Friday, January 27th, Beginning of Class
Instructions
Please include the following information on the first page of your completed homework.
1. Your name
2. STAT 3115
3. Homework #1
4. Due Date
5. List of students you worke