STAT 511 - 5 & 6 Homework SOLUTION 11
Ten points for each question, a total of 60 points.
1. The following data refers to yield of tomatoes (kg/plot) for four different levels of salinity. Use the F
t
Examples for chapter 3
A store carries flash drives with either 1 GB, 2 GB, 4 GB, 8 GB, or 16
GB of memory. The accompanying table gives the distribution of Y =
the amount of memory in a purchased dr
Chapter 8
A statistical hypothesis, or just hypothesis, is a claim or assertion
about population characteristic
Definition
The null hypothesis, denoted by H0, is the claim that is initially
assumed
Practice Exam 2
1. The breaking strength of a rivet has a mean value of 10,000 psi and a standard deviation of 500 psi.
(a) What is the probability that the sample mean breaking strength for a random
Statistics 511-8&10
Midterm Examination 2
Tuesday, November 12th, 2015
Name (please print) :_
Section: _
Time: 60 minutes
Please sign below to indicate your agreement with the following honor code.
Ho
Chapter 7
Suppose that the parameter of interest is a population mean and that
1. The population distribution is normal;
2. The value of the population standard deviation is known.
We have
and
Thi
Chapter 9
The Two-Sample t Test and Confidence Interval
Theorem
When the population distribution are both normal, the standardized
variable
(9.2)
has approximately a t distribution with df v estima
Chapter 10
Example 1 Consider an experiment in which several different types of
shipping boxes were compared with respect to compression strength
(lb).
Notations
i = 1, I is a group index
xi, j =
1. The number of space shuttle flights taken by each of 313 astronauts are
summarized in the following frequency distribution.
Flight
0
1
2
3
4
5
6
7
Frequency(# astronauts)
67
71
57
40
39
30
6
3
Rela
Chapter 6
Example 15 Suppose we want to find the flaw ratio p of new bike
helmets manufactured by a certain company. How can we estimate
the probability of flawed helmet?
A statistic is any quantity
Example for Chapter 2
Example 8 (2.2.1). Two bags, bag #1 contains two balls marked 1 and
2 respectively; bag #2 contains three balls marked 1, 2, and 3
respectively. Pick a ball from bag #1, and the
STAT 511-1
QUIZ 2
KEY
A psychiatrist believes that 60% of all people who visit doctors have problems of a psychosomatic
nature. He decides to select 9 patients at random to test his theory. Assume the
a. AlUAZUA3
b. AlﬂAzﬂ/h
c. AlnAz’nAs'
d. (A1 (WA; mA§)u(A{mA2 nA§)u(A,’mA£ HA3)
e. A1U(A2FWA3)
a. P(A UB) = .50 + .40 — .25 = .65.
b. P(neitherA nor B) = P(A’ n B’) = P(A
Statistical Methods (STAT 511)
Final Exam, Spring 2012
7:00pm-9:00pm, RHPH 164
Thursday, May 2, 2013
There are totally 42 points in the exam. The students with score higher than or equal to 40
points
STAT 511 Midterm Exam (Take-Home Part)
Multiple Choice
Identify the choice that best completes the statement or answers the question.
_
1. Data was accessed for a large group of students, considered t
Statistical Methods (STAT 511)
Final Exam, Spring 2012
7:00pm-9:00pm, RHPH 164
Thursday, May 2, 2013
There are totally 42 points in the exam. The students with score higher than or equal to 40
points
STAT 511 - 5 & 6 Homework SOLUTION 9
Ten points for each question, a total of 60 points.
2+2+2+2+2
1. A new design for the braking system on a certain type of car has been proposed. For the current
sy
Name:
ANSWER
.
(6)
Statistics 511-6, Quiz 4
(4)
1. A random sample of 10 houses in Big Rapids, each of which is heated with natural
gas, is selected and the amount of gas (therms) used during the mont
Name:
ANSWER
.
(5)
Statistics 511, Quiz 3
The heights of men in a certain population follow a normal distribution with mean 69.7
inches and standard deviation 2.8 inches.
a) If a man is chosen at rand
1. Short-answer questions.
(a) The number of contaminating particles on a silicon wafer prior to a certain rinsing
process was determined for each wafer in a sample of size 100, resulting in the
follo
Name:
ANSWER
.
Statistics 511-8&10, Quiz 1
n
s
n
2
yi y
i
1
n 1
y
2
i
ny 2
i
1
n 1
Consider the following observations on shear strength of a joint bonded in a particular manner:
20.0
4.4
33.1
66.7
Name:
ANSWER
.
(4) (3)
Statistics 511-8&10, Quiz 2
An electronics store has received a shipment of 20 table radios with connections for external
devices. Twelve of them have two connection slots, and
Hw3 solution
b. P(A U B)=0.6+0.4-0.3=0.7
c. P(neither A nor B) =P(A B)=1-0.7=0.3
d. The event of interest is A B: from a Venn diagram, we see P(AB)=P(A)-P(AB)=0.6-0.3=0.3
e. From a Venn diagram, we se
STAT 511
Quality Control Methods
1
'
$
Control Charts for Process Monitoring
Slide 1
Industrialized manufacturing processes achieve great product
uniformity through controlled environments such as mac
STAT 511
Basic Statistical Inferences
1
'
$
Basic Structure of Inference
Slide 1
Statistical Inference makes educated guesses about the
population based on information from the sample. All guesses
are
STAT 511
Categorical Data Analysis
1
'
CI and z-Test for Population Proportion
As reported by AMA, 16% doctors in any given year are subject
to malpractice claims. A hospital
of 300 physicians receive
STAT 511
'
Probability and Probability Distributions
1
$
Experiment, Sample Space, and Event
Experiment: the process of obtaining observations.
Sample space: all possible outcomes of an experiment.
Ev