TBUS 301
Statistical Inference Problem Set
Dr. Bergman
1) A simple random sample of 60 items resulted in a sample mean of 80. The population standard
deviation is = 15.
a. What is the 95% confidence interval for the population mean?
b. Assume that the sam
Margaret Robinson The Bungee Jumping Real Estate
Agent
Real Estate can be a highly competitive market, and having every advantage is very important. Margaret
Robinson, in addition to billing herself as the Bungee Jumping Real Estate Agent, also invests in
TBUS301
Multiple Regression 2 Homework
Dr. Bergman
1. A firm wants to estimate how customer satisfaction is related to meal price and type of
restaurant. They estimate the following equation:
CustSat= 0 + 1 Price+ 2 Type+ i
Where
Customer Satisfaction is
TBUS 301
Mathematical Models in Excel - HW
Dr. Bergman
1. ABC wants to add a third product to their product line cleaning fluid. They can make $50 per
ton of this third product. Recall, that ABC earns $40 for each fuel additive ton produced, and $30
for e
TBUS301
Simple Regression - HW
Dr. Bergman
1) You are considering opening an Estonian cuisine restaurant and wonder how much people in
your target community spend on eating out relative to their incomes. You commission a
telephone survey and build the fol
Name:
Statistical Inference Case
Before looking at the data, which area do you think will have higher home prices and why?
Sale Prices Histogram Area #1
Area #2
Average Sales Price
Area #1
St. Dev Area #1
Sale Prices Histogram
Average Sales Price
Area #2
TBUS301
Multiple Regression HW
Dr. Bergman
1) A movie theater owner wants to predict weekly gross revenue as a function of advertising
expenditures, both TV (in $1000s) and Newspaper (in $1000s). The following regression equation
was estimated:
a. Write t
TBUS 301
Optimization HW
Dr. Bergman
Find the second derivative for the following functions:
1)
f ( x )=x 3+ 2 x 23 x+ 9
2)
f ( x )=x 218 x 2
3)
f ( x )=e 3 x 9 e x
1
4) A company manufactures and sells x smartphones per week. The weekly price-demand and
Multiple Regression Case Study 2
Estimate a regression with home sales price as the dependent variable and bedrooms, bathrooms, sqft, and
year built as explanatory variables for the TWO DIFFERENT ZIP CODES. (That is, include both sets of data in
the regre
Soc 5811: Practice Problem Set- Confidence Intervals and Hypothesis Testing
1. A researcher is interested in whether or not high school students are passing a new statewide
exit exam. A random sample of 100 students has a mean of 76 and a standard deviati
Math 125, Winter 2016, Sections D and E, Answers to Midterm II,
1. (a) 2 arcsin
3
(b) xe2x
2
2. (a) 8 ln 2
x
2
3 2x
e +C
4
5 ln 3
(b) Converges to
3. (a)
Z
4
1
s
p
x 4 x2
+C
2
1+
2055
64
(c) L 32.11
2
.
e
1 3
x
2
1
x
2
3
2
,
(b) L =
4. 10, 358, 400 ft. lb
Math 125C&G
Midterm II
Your Name
Winter 2016
Your Signature
Student ID #
Quiz Section
Professors Name
TAs Name
Problem
Total Points
1
10
2
10
3
10
4
10
5
10
Total
50
Score
Phones o, no earplugs.
This exam is closed book. You my use one 8 12 11 sheet of
Math 125 E and F
Midterm 2 Solutions
Your Name
Burdzy, Autumn 2015
Your Signature
Student ID #
Circle quiz section and print TAs name:
EA
EB
EC
ED
FA
FB
FC
FD
Turn off all cell phones, pagers, radios, mp3 players, and other similar devices.
This exam is
MIDTERM 2
MATH 125
Last name, first name:
Section:
Student number:
Signature:
Please do not start working until instructed to do so.
You have 80 minutes.
You must show your work to receive full credit.
Scientific, but not graphing calculators are OK.
You
Math 125 E and F
Midterm 2
Your Name
Burdzy, Autumn 2015
Your Signature
Student ID #
Circle quiz section and print TAs name:
EA
EB
EC
ED
FA
FB
FC
FD
Turn off all cell phones, pagers, radios, mp3 players, and other similar devices.
This exam is closed bo
Math 125, Sections D and E, Midterm II, February 25, 2016
Name and Section
Instructions
There are 4 questions. The exam is out of 40 points.
You are allowed to use one page of notes written only on one side of the sheet in your own handwriting.
Hand in
'
Math 125, Sections C and F, Fall 2014, Midterm II
November 13, 2014
-'-.) _ _ _ _ _ _ _ _ _ _ _
Instructions.
There are 4 questions. The exam is out of 40 points.
You are allowed to use one page of notes written only on one side of the sheet in your o
Math 125, Sections C and F, Fall 2014, Midterm II
November 13, 2014
Name
TA/Section
Instructions.
There are 4 questions. The exam is out of 40 points.
You are allowed to use one page of notes written only on one side of the sheet in your own handwriting
MIDTERM 2 ANSWERS
MATH 125
Problem 1.(13 points total) Compute the following integrals. Give your answer in exact form (do
not use decimals).
a.(6 points)
Z
x2
2x 3
dx
+ 2x + 1
Solution: partial fractions. Get
b.(7 points)
Z
/3
/4
2 ln |x + 1| + 5
1
+ C.
MATH Questions
Show work/explanation where indicated.
1. (4 pts) Which of these graphs represent a one-to-one function? Answer(s): _A_
(no explanation required.) (There may be more than one graph that qualifies.)
(A)
(B)
(C)
(D)
2. (6 pts) Students in a m
hw23S4.4-5
12/14/16, 3)51 PM
JAE HYUN PARK
Math 124, section D, Fall 2016
Instructor: Dmitriy Drusvyatskiy
WebAssign
hw23S4.4-5 (Homework)
Current Score : 109 / 109
Due : Monday, December 5 2016 11:59 PM PST
The due date for this assignment is past. Your
hw22S4.4
12/14/16, 3)56 PM
JAE HYUN PARK
Math 124, section D, Fall 2016
Instructor: Dmitriy Drusvyatskiy
WebAssign
hw22S4.4 (Homework)
Current Score : 50 / 50
Due : Friday, December 2 2016 11:59 PM PST
The due date for this assignment is past. Your work c
hw24S4.7
12/14/16, 3)50 PM
JAE HYUN PARK
Math 124, section D, Fall 2016
Instructor: Dmitriy Drusvyatskiy
WebAssign
hw24S4.7 (Homework)
Current Score : 47 / 47
Due : Wednesday, December 7 2016 11:59 PM PST
The due date for this assignment is past. Your wor
Math 300 A & B Autumn 2016
Homework 6
Upload to Canvas by Friday, December 2, 10:30 am
Continue to follow the Homework Guidelines posted on the course website.
1. Let A = cfw_1, 2, 3, 4, 5 and B = cfw_a, b, c, d. For each of the following relations from A
3.
A mass of 1 kg stretches an vertically positioned spring 39.2m. We assume the mass is set
in motion from the spot 1m higher than its equilibrium position with a downward velocity of
0.7ms1 , and the damping coefficient of the system is Nsm1 for some 0.