Statistics for Business Control and Regression Models
STAT UB 103

Fall 2015
Haofei Liu
Statistics HW #2
1)
A) Yes, the data does seem to have a reasonably bellshaped distribution. However, it is slightly
skewed to the left. There is a potential outlier which is 100.8
Histogram of Temp
25
Frequency
20
15
10
5
0
96.75
97.50
98.25
Statistics for Business Control and Regression Models
STAT UB 103

Fall 2014
STATUB.0103.04
Prof. Frydman
October 16, 2014
Solutions to Quiz 2 (A)
(9) 1) An aerospace company has submitted bids on two separate federal
government defense contracts, A and B. The company estimates that it has
a 60% chance of winning contract A and a
Statistics for Business Control and Regression Models
STAT UB 103

Fall 2014
STATUB.0103.04
Prof. Halina Frydman
November 25, 2014
Solutions to Homework 7
(6) Exercise 11.108 a)d)
(1) a)
b
b
0 = 99 045 1 = 10281
(2) b)
0 : 1 0
1 : 1 0
reject 0 if
obser 00520 = 1725
Since
obser =
b
1
= 648 1325
1
we reject 0
[You can also use a
Statistics for Business Control and Regression Models
STAT UB 103

Spring 2015
Statistics and
Data Analysis
Exam #1
REVIEW
Presenting
Qualitative Data
Summary Table
1. Lists categories & number of elements in category
2. Obtained by tallying responses in category
3. May show frequencies (counts), % or both
Row Is
Category
Major
Acco
Statistics for Business Control and Regression Models
STAT UB 103

Fall 2014
STATUB.0103.04
Prof. Halina Frydman
October 3, 2014
Solutions to Homework 3
Exercise 4.34. page 198
The IQ scores are values and the probabilities with which these values
occur, say for Market investors, are the numbers in Invest in Market column
divided
Statistics for Business Control and Regression Models
STAT UB 103

Fall 2014
STATUB.0103.04
Prof. Halina Frydman
September 19, 2014
Solutions to Quiz 1(A)
(8) 1) An automobile manufacturer routinely keeps records on the number of finished
cars (passing all inspections) produced per eight hour shift. The data for the last 21
shift
Statistics for Business Control and Regression Models
STAT UB 103

Spring 2012
StatUB.0103.03: Statistics for Business Control and Regression Models
Prof. Halina Frydman
November 12, 2011
Solutions to Review Questions for Test 2
1) Let be the proportion of times that face 1 or 6 occurs when you
toss a fair die 49 times.
a) What is
Statistics for Business Control and Regression Models
STAT UB 103

Spring 2016
Chapter 3
Probability: chance that an uncertain event will occur
Experiment: process of obtaining outcomes for uncertain events
Sample space: collection of all possible sample points
Simple event: outcome from a sample space with one characteristic
E
Statistics for Business Control and Regression Models
STAT UB 103

Spring 2015
Statistics for Business Control,
Regression and Forecasting
Models
Statistics, Data, &
Statistical Thinking
Introduction
Lucius Riccio
[email protected]
Office: KMC 8171
Office Hours: By Appointment
TA: Lisa Gingold Greenberg
[email protected]
Ana
Statistics for Business Control and Regression Models
STAT UB 103

Fall 2014
STATUB.0103 Statistics for Business Control and Regression Models
Prof. Frydman
December, 2013
Solutions to Final Exam (A)
1) In order to investigate the feasibility of starting a Sunday edition for
a large metropolitan newspaper, information was obtain
Statistics for Business Control and Regression Models
STAT UB 103

Fall 2015
Haofei Liu
Statistics HW #1
1. A group of college students believes that herbal tea has remarkable restorative
powers. To test this belief, they make weekly visits to a local nursing home, visiting
with the residents and serving them herbal tea. The nursi
Statistics for Business Control and Regression Models
STAT UB 103

Spring 2012
StatUB.0103.03: Statistics for Business Control and Regression Models
Prof. Halina Frydman
November 21, 2011
Solutions to Test 2 (A)
1) (8pts) In a factory the time it takes to assemble given equipment
varies from worker to worker, but it is known that t
Statistics for Business Control and Regression Models
STAT UB 103

Spring 2012
StatUB.0103.03: Statistics for Business Control and Regression Models
Prof. Halina Frydman
October 11, 2011
Solutions to Review Questions (1)
1) Production records for an automobile manufacturer show the following
gures for production per shift in stema
Statistics for Business Control and Regression Models
STAT UB 103

Fall 2014
STATUB.0103.04
Prof. Halina Frydman
November 11, 2014
Solutions to Homework 6
A1) A supermarket manager is trying to decide how many check out
registers to keep open during early morning hours. To aid her analysis she
recorded the number of customers who
Statistics for Business Control and Regression Models
STAT UB 103

Spring 2016
Homework VI
Due date: 4/8/16 @ 3:30 PM
Late assignments will not be accepted.
1. Two placement exams are available that students can take to determine which math class they should
begin with in their freshman year. It is believed that there is no differen
Statistics for Business Control and Regression Models
STAT UB 103

Spring 2013
HW#1
Please only use pen or printer ink, and staple your work!
1) What is going to be the population parameter that we will wish to estimate throughout this
course?
2) Suppose we take a random sample from a populat
Statistics for Business Control and Regression Models
STAT UB 103

Fall 2014
Chapter 5 Outline
5.1 The Concept of a Sampling Distribution


Neither the sample mean nor the sample median will always fall closer to the
population mean
o We cannot compare these 2 sample statistics, or any two sample
statistics, on the basis of thei
Statistics for Business Control and Regression Models
STAT UB 103

Fall 2014
STATUB.0103.04
Prof. Frydman
November 4, 2014
Solutions to Quiz 3 (A)
(9) 1) Suppose that = a dollar amount you win or lose in a certain
game is normally distributed with the mean of $30 and standard deviation
of $21
(2) a) If a person plays the game, wh
Statistics for Business Control and Regression Models
STAT UB 103

Fall 2014
Chapter 3 Outline: Probability
3.1 Events, Sample Spaces, and Probability





Observation or measurement: the result we see
Experiment: the process of making an observation
o This definition is broader than that in the context of science
o Can be an
Statistics for Business Control and Regression Models
STAT UB 103

Fall 2014
STATUB.0103.04
Prof. Halina Frydman
September 26, 2014
Solutions to Homework 2
A1) Of the cars on a used car lot, 70% have air conditioning (AC) and
40% have a CD player. You are also told that the events "car has AC" and
"car has a CD player" are indepe
Statistics for Business Control and Regression Models
STAT UB 103

Fall 2016
STATUB.0103.05Statistics for Business Control and Regression Models
Prof. Frydman
September 6, 2016
Homework 1due Friday, September 15
For any assignment you are permitted to work in teams, but each student must independently
write their own solution (
Statistics for Business Control and Regression Models
STAT UB 103

Fall 2014
STATUB.0103.04
Prof. Halina Frydman
October 12, 2014
Homework 4
(due October 21)
Reading: Chapter 4: 4.54.6, 4.9 (about Uniform distribution only)
from MBS
Lecture Notes #4 on The Normal Distribution
Exercises: 4.108 page 235 from MBS and the following
Statistics for Business Control and Regression Models
STAT UB 103

Fall 2014
STATUB.0103.04
Prof. Halina Frydman
October 23, 2014
Homework 5
(due October 30)
Reading: Chapter 5 from MBS
LN #6 Properties of the sample mean and LN#7 Properties of the sample proportion
A1. Consider a Bernoulli distribution with = 05
a) Find the mean
Statistics for Business Control and Regression Models
STAT UB 103

Spring 2016
Statistics Notes
Chapter 1
Two types of statistics
o Descriptive
o Inferential
Types of data
o Univariate: one fact for each object (one column in spreadsheet)
o Multivariate: two or more facts for each object in dataset (many
columns)
Ordinal data: qu
Statistics for Business Control and Regression Models
STAT UB 103

Spring 2016
Statistics Notes
Chapter 1
Two types of statistics
o Descriptive
o Inferential
Types of data
o Univariate: one fact for each object (one column in spreadsheet)
o Multivariate: two or more facts for each object in dataset (many
columns)
Ordinal data: qu
Statistics for Business Control and Regression Models
STAT UB 103

Fall 2016
STATUB.0103.06Statistics for Business Control and Regression Models
Prof. Frydman
Solutions to Homework 2
(8) Problem 1
In the class survey, 25 females and 47 males reported their expected annual salaries.
a. (2) Obtain box plots of expected annual sala
Statistics for Business Control and Regression Models
STAT UB 103

Fall 2016
STATUB.0103.05Statistics for Business Control and Regression Models
Prof. Frydman,
Solutions to Homework 5
(6) Problem 1
Suppose that the dollar amount that you win (could be negative) in a
game is normally distributed with the mean of $30 and standard
Statistics for Business Control and Regression Models
STAT UB 103

Fall 2016
STATUB.0103.05Statistics for Business Control and Regression Models
Prof. Frydman
Solutions to Homework 1
Problem 1
In the following two scenarios, state what population is involved and why the sample is biased.
a. You want to know information about con
Statistics for Business Control and Regression Models
STAT UB 103

Fall 2016
STATUB.0103.05Statistics for Business Control and Regression Models
Prof. Frydman
September 22, 2016
Homework 3due September 29
Problem 1
Suppose you flip five coins. What is the probability of getting at least
one head?
Problem 2
How many answer sheet
Statistics for Business Control and Regression Models
STAT UB 103

Fall 2016
STATUB.0103.05Statistics for Business Control and Regression Models
Prof. Frydman,
October 6, 2016
Homework 4
(due date: October 13)
Reading: LN# 6 and 7. MBS: 4.14.3.
Problem 1 A construction job is comprised of two tasks, which we call
task A and Tas