Chapter 4.1-4.4. Probability .
Remember the objective:
Probability
1.
Population
Sample
2.
Describe the
sample data
3.
Probability
Compute measures of
variability
4.
1
Why the price of a car insurance changes when you turn
24?
The price depends on how lik
Bivariate Data part 1 (both variables are
categorical)
Example : Data were collected to measure the effect of
the body weight on the blood pressure in individuals
aged between 15 and 30.
Sample unit: individual aged between 15 and 30.
Variables measured i
My UMass Amherst
H
Course material
STATISTC
240
J.Jeneralczuk
Spring17
SPIRE#19893
.
Chapter 3 - part 1
Handout -Chapter 3.2 and 3.4
Handout -Chapter 3.2 and 3.4
Jane Norton
Help & Resources
My UMass Amherst
H
Course material
STATISTC
240
J.Jeneralczuk
Spring17
SPIRE#19893
.
Summary .pdf
Chapter 3 - part 1
Summary .pdf
Jane Norton
Help & Resources
Stat 111/Spring 2017
Practice Midterm Exam
1. The following questions apply to the aspirin/heart attack study described in Chapter 1.
a) Was this an observational study or a randomized experiment?
b) On the basis of this study, can you conclude that an as
Stat 111/Spring 2017 Practice Midterm Exam KEY
1. The following questions apply to the aspirin/heart attack study described in Chapter 1.
a) Was this an observational study or a randomized experiment?
randomized
b) On the basis of this study, can you conc
Stat 525
Fall 2016 Midterm Exam Practice Problems.
Location and Time:
The Midterm Exam is Wednesday, Oct. 26, 7:00 9:00 pm, in Lederle Lowrise Room A301.
This is in the lowrise building across the courtyard from Lederle Tower.
Coverage:
The Midterm Exam w
Statistics 525: Regression Analysis, Fall 2016
NOTE: The SAS programming language is required for this course. SAS is not available for
Macintosh computers. See information on SAS below under "Computing".
Instructor:
Erin Conlon
Contact:
Office LGRT 1436,
Stat 525
Fall 2016 Midterm Information
Location and Time:
The Midterm Exam is Wednesday, Oct. 26, 7:00 9:00 pm, in Lederle Lowrise Room A301.
This is in the lowrise building across the courtyard from Lederle Tower.
Coverage:
The Midterm Exam will cover Te
Stat 525: Fall 2016 IE Project Topics
The following are descriptions of projects for the IE component of Stat 525. The
number of groups w i l l be limited due to time constraints when projects are presented
in class at the end of the semester.
1. Baseball
The Integrative Experience (IE) component of Stat 525, Fall 2016
-See Due Dates Below, with Assignment Information.
-The TA for the course is available to help with computing questions. See the website for office
hours of the TA.
Integrative Experience
St
Robert Bucchianeri
September 16, 2015
Stats 240
Chapter 1 Notes:
1. Statistics is the science of collecting, analyzing, presenting, and interpreting data, as well
as of making decisions based on such analyses.
2. The whole set of numbers that represents t
Chapter 8.1/8.2:
1. The assignment of values to a population parameter based on a value of the corresponding
sample statistic is called estimation.
a. is called the true population mean and p is called the true population proportion.
b. Ex: to estimate th
Chapter 5.1 5.3:
1. The process of randomly selecting a family is called a random or chance experiment.
a. A random variable is a variable whose value is determined by the outcome of a
random experiment.
i. A random variable that assumes countable values
Chapter 9.2 l-lypotltesis tests about It: a known
Case I. If the following three conditions are fulfilled:
I. The population standard deviation 6 ist known
2. The sample size is small (i.e. a < 30)
3. The )OpllltlllOIt from which the sample is selected is
Homework 9 not to turn in
9.10Write the null and alternative hypotheses for each of the following examples. Determine if each is a case of a
two-tailed, a left-tailed, or a right-tailed test.
a. To test if the mean amount of time spent per week watching s
Money and Banking
Economics 311 Fall 2016
Problem Sets #5 - #8 - SOLUTIONS
1. Consider the Euro-dollar exchange rate (nominal exchange rate = Euros/$US). For
each of these examples, use a supply/demand diagram for the foreign exchange
market to sho
STAT 525: Fall 2016
Homework 5 Solution
1)
a) The scatterplot from SAS is below.
b) From the scatter plot, one can see that the linear relationship between Y (liking) and
X1. It appears that Y slightly increases as the level of X2 increases.
c) From proc
STAT 525: Fall 2016
Solution 6
1)
a) See SAS output below.
b) See SAS output below. The estimated regression function is:
c) We see that all the regression coefficients b0, b1, b2 all change when adding X3 to the
model.
1
d) See SAS output below.
SSR(X1)
STAT 525: Fall 2016
Homework 6
Due: Wednesday, November 9, beginning of class.
This homework continues with more questions from Chapter 7, and also covers
Chapter 8. In the previous assignment, you were assigned to read Chapter 7, excluding
sections 7.4,
Money and Banking
Economics 311
Midterm Exam Fall 2016
25 October 2016
Part I Definitions Six Questions
For each question, please define the term briefly in one or two sentences.
(1) Liquidity the ease with which an asset can be turned into ca
STAT 525: Fall 2016
Homework 7 Solution
1) 9.6) Flowcharts omitted. See textbook section 9.4.
2)
a) See SAS output below. The maximum adjusted R-squared_p, minimum C_p,
minimum AIC_p, and minimum PRESS_p all identify the subset of x1 x3 as the best
subset
Money and Banking
Economics 311 Fall 2016
Problem Set #8
1. Suppose the current exchange rate of the Peruvian sol (the currency of Peru)
were 3.5 soles/$US. Consider a U.S. investor who is thinking of using dollars to
purchase one-year Peruvian gov
Money and Banking
Economics 311 Fall 2016
Problem Set #7
1. Consider a commercial banking sector in which the reserve requirement is 8%,
the ratio of excess reserves to deposits is 2%, and the ratio of currency holdings to
deposits is 10%.
a.
Money and Banking
Economics 311 Fall 2016
Problem Set #6
1. Consider a commercial bank with assets of $2,000 million ($2 billion) and
liabilities of $1,700 million. The banks after-tax earnings are $30 million.
a. Calculate the return on assets
STAT 525: Fall 2016
Homework 7
Due: Wednesday, November 30, beginning of class.
Read Chapter 9 in the text.
1) 9.6. Rather than a flowchart, you can just describe each step if you prefer. This
question does not require SAS.
2) Refer to the data set in the
Take Home Exam IV:
R exam over Chapters VIII, XI
1. ( 5 pts.) Suppose your data sample consists of the following scores on a history
exam:
Scores = c(28, 40,21, 26, 17 ,27, 21, 28, 36, 34, 22, 29, 40, 27, 41, 35, 33, 34, 32, 32)
You know that the populati