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JIANG XINYAN
OIS 3440-002
Case 10.2 Hamilton Marketing Services
1. a sample proportion for the pricing option 1 with the $40.00 is 6/80=0.2=20%, for the
pricing option 2 with the $30.0014/80=0.175=17.5%
2. Through the calculation I did, the pricing option

Jiang Xinyan
OIS3440-002
Case 10.3
Analysis of Green Valley Assembly Company
Old
Job-Enriched
Sample size
50
50
Xbar (/hr)
11
9.7
Standard size (/hr)
1.2
0.9
Let 1 be population mean output of old group and 2 be population mean output of
job-enriched grou

Scoreforthisquiz:85.68outof99.96
SubmittedSep11at5:28pm
Thisattempttook14650minutes.
Question1
3.57/3.57pts
Skiptoquestiontext.
A decision maker wishes to test the following null and alternative hypotheses using an alpha
level equal to 0.05:
H0 : 1 2= 0
H

OIS-3440 Applications fo Business Statistics
Chapter 15 In-Class quiz (30 minutes)
Name (Please PRINT) _
TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false.
1) The multiple coefficient of determination measures the percentage

Scoreforthisquiz:100outof100
SubmittedOct20at12:59pm
Question1
5/5pts
The goodnessoffit test is always a onetail test with the rejection region in the upper tail.
Correct!
True
False
Question2
5/5pts
Skiptoquestiontext.
When the variables of interest are

Scoreforthisquiz:100outof100
SubmittedSep28at3:54pm
Thisattempttook18920minutes.
Question1
2.5/2.5pts
In a oneway analysis of variance design, there is a single factor of interest but there may be
multiple levels of the factor.
True
False
Question2
2.5/2.

Scoreforthisquiz:100.08outof100.08
SubmittedNov3at2:37pm
Thisattempttook12774minutes.
Question1
2.78/2.78pts
Skiptoquestiontext.
A study was recently performed by the Internal Revenue Service to determine how much tip
income waiters and waitresses should

Continuous distribution
Normal distribution: any distribution with a mean and standard deviation
Standard normal distribution: mean of zero and deviations of 1
Total area under the curve of SND is one. Area = p(x)
Sampling errors
1.
What it is
2.
Why it o

Sample average is never equal to population average.
Sample error = xbar - mu
Taking the bottom sample average and top sample average - the min and max sampling error.
CLT : central limit theorem
X double bar = the average of all sampling averages.
Propor

Mean: average
Sample average:
Population average:
The most important reason to study statistic because as business managers, you need to infer
from statistics what is going to come around the corner and be proactive. Or in other words,
estimate populati

First step for regression models
1. Find correlation.
2. Focus on the correlation of the first column (the dependent variable against all of the independent
variables) they should have a high correlation. The correlation between other independent
variable

Hypothesis statement:
Null hypothesis (Ho) - "Status Quo", = signs, greater or equal to signs, less or equal to signs
Alternative hypothesis (Ha) also called research hypothesis - whatever we want to determine, to
be found, whether this is the case, noneq

Confidence interval for the population average.
Point estimate = sample average
Point estimate margin of error ( e )
Margin of error = critical error and standard error
Two cases
1. When standard deviation is known
Xbar z(standard of deviation pop/
n
)
n

Discrete probability distribution: numbers on a countable interval, integers.
Continuous probability distribution: full spectrum of data, those between integers.
Ei p(x<5) = [0 - 5) all numbers from 0 to 5, including 0 and excluding 5
Random variables: an

business stats: making sense of data
1.Descriptive stats: making sense of graphs
2.Probability stats: (chp 4)
3.Inferential stats: study samples from calculations, and analyze examples to draw
inferences or conclusions about the calculations (most of text

We lose a degree of freedom every time we estimate
Questions that need to be answered to choose a sample size
What margin of error can we live with
What confidence level they need?
When calculating the sample population, always round up to the nearest int

JAN 9 CLASS NOTES
Thursday, January 9, 2014
7:25 AM
Frequency distribution - how things are distributed and how often things happen that way.
Histogram - graph of frequency distribution.
Stem and leaf diagram - like a bar graph with data inside.
Frequency

OIS-3340 Capstone Project
TOPIC: Are countries with high growth rates for urbanization more likely to undergo
deforestation?
REAL-WORLD DATA:
Urbanization- http:/wdi.worldbank.org/table/3.12#
Deforestation- http:/wdi.worldbank.org/table/3.4
BUSINESS QUEST

OIS 3440 Applications of Business Statistics
Summer 2012
Midterm 1
Chapters 10 and 13
Name: _
Instructions:
1. Please write your name on both the scantron and the exam itself.
2. Please write your answers on both the scantron and the exam itself.
3. Relax

Statistics - making sense out of numbers. Procedures for collecting data:
Business statistics: a collection of procedures and techniques that ' EXPEFiWEHtSI a prDEESS that
are used to convert data into meaningful info in a business environment PmdUCES 3 S

= population average. Sum/number in population
N
xi
i=1
N
(with a bar on top)= sample average. Sum/number in sample
n
xi
i=1
n
N=number in population
n=number in sample
Parameter= derived from a population
Statistic= derived from a sample
Median (Md) -

Process View of Organizations and Littles Law
OIS 3660:
Operations Management
Session 3
Jaelynn Oh
David Eccles School of Business
University of Utah
Fall 2014
1
Summary of Last Class
Organization as a collection of processes
Black box that takes inputs

Alpha Air:
Choose Q to minimize costs
Alpha Air has to decide how many meals to load on a flight from PHL to LAX.
The meals are sold on board for $10.00 and cost the airline $4.00 each. All
meal orders must be made at least 48 hours before the flight depa