MidTerm Exam
Question 1
a) A continuous random variable X has the probability density function given by 3
2
; 0 x2
(2 x)
f ( x) 8
0
; otherwise
(i)
Calculate the mean of X and variance of X.
(ii)
Calculate
.
(iii)
Find
.
b) Given X ~ Exp ( 2) and the moment generating function (MGF) of X is given
M X (t )
2
2t
.
Find the mean and variance of X.
c) Given
for x = 1, 2, 3, 4. Find the moment generating function of X.
Question 2
a) According to a survey, 45% of all students at a large university suffer from math anxiety. Four students are randomly selected from this university. Let X denotes the number of students in this sample who suffer from math anxiety.
(i)
Construct the probability distribution of X. [Leave your answer in 3 decimal places] (ii)
Find the probability of at least two students suffer from math anxiety. (iii)
Find the probability of 3 or 4 students suffer from math anxiety.
b) A research scientist reports that mice will live an average of 40 months when their diets are sharply restricted and then enriched with vitamins and proteins. Assuming that the lifetime of such mice is normally distributed with a variance of 3.308 year. (i)
Find the probability that a given mouse will live more than thirty two months. (ii)
Find the probability that a given mouse will live between forty two months and fifty months.
(iii)
Find the lifetime exceeded 85% of these mice.
c) A group of students consists of 60% men and 40% women. Among the men, 30% are foreign students, and among the women, 20% are foreign students.
(i)
What is the probability that a selected foreign student is a woman? (ii)
What is the probability that a selected student is a foreign man?
...Question 1
0 out of 5 points
A term for a target population’s abilities, current resources, and future resources is
Question 2
5 out of 5 points
Which of the following is NOT a key element to include in a mission statement
Question 3
5 out of 5 points
Caution should be used when using only existing lists as a sampling frame because they
Question 4
5 out of 5 points
What creates the basis or foundation for program planning?...
...two may be folded into existing positions in the rest of the company. This memorandum includes a brief description of each employee, my recommendation for termination or retention, possible risks that may be inherent with each particular employee in terms of post termination litigation, and severance offered if applicable.
Sally James
Ms. James is a 55 year old White female. She is beloved at the company for her friendliness and willingness to help others. Sally is an...
...their goals.
2. What can a company do to decrease its customer’s price sensitivity? Would all of the customers be likely to react in the same way?
Firms should be interested in maintaining low consumer price sensitivity since it affects their longterm profitability. Customers for all products and services have some degree of price sensitivity. Customers become less price sensitive when there are fewer choices for fulfilling their needs. Companies should specialize or...
...Christian Johnson
Tracy Cave
English 1B 0744
September 24, 2013
Untitled
All stories do not speak the same tale. In order to make a story more interesting and compelling, the author must use literary devices to help the reader understand their point of view. Some devices are obvious to the reader immediately, such as narration, characters and theme. Other literary devices are more subtle, and become revealed as the story is read. The style, tone and language of an author helps the...
...1. (TCO A) Direct material cost is a part of: (Points : 6)
Conversion Cost YES.... Prime Cost NO
Conversion Cost NO.... Prime Cost YES
Conversion Cost YES.... Prime Cost YES
Conversion Cost NO.... Prime Cost NO 

2. (TCO A) The costs of staffing and operating the accounting department at Central Hospital would be considered by the Department of Surgery to be: (Points : 6)
direct costs.
sunk costs.
incremental costs. ...
...
Midterm Study Guide (Core 300)
Study items for Intro and Presocratics:
Know the etymological definition of philosophy.
Philo = love
Sophia = Wisdom
Philo+Sophia = love of wisdom
Be able to explain the basic subdivisions of philosophy and list some questions that arise in each subdivision.
517207517462500331470015494000195262514605000METAPHISICSEPISTEMOLOGYVALUE THEORY
THE STUDY OF ULTIMATE REALITY THE STUDY OF KNOWLEDGETHE STUDY OF VALUE
OR—What’s really real!Moral...
...
CHE 145 B5z1 Lab Exam I Name_____________________
Direction: Answer the questions and show your work in the space provided.
1. Convert the following numbers to standard exponential form:
a) 0.00352 _____3.52x103__ __ b) 0.01847 _____1.847x102____
c) 7,604 ________7.604x103__ _ d) 536.2 x 105 ____5.362x107 _______
2. How many significant figures are there in the following:
a) 0.10849 ________5_________ b) 0.864...
...what does it say about the term “addiction”?
The Diagnostic and statistical Manual of Mental disorders.
The DSM is a book used almost universally by mental health professional to diagnose and receive insurance reimbursement for treatment of behavioral disorders.
The DSMIVTR avoided use of the term addiction in favor in favor of the seemingly more scientific term dependence.
3. What are the symptoms that the DSM uses to define addiction?...