COMM 291 Application of Statistics in Business (JanApr 2014)
ASSIGNMENT 2 Submit On-line to Connect
Due 1:00 pm, Wednesday, February 5, 2014
Instructions and Advice:
This assignment comprises four que
PRACTICE QUESTIONS FOR
THE MIDTERM EXAM
Part A.
Midterm Exam 2013
Midterm Exam 2012
Midterm Exam 2011
Midterm Exam 2010
Questions, Answers and Explanations
Part B.
Past Years Midterm Exams
Questions,
COMM 291 Application of Statistics in Business (JanApr 2014)
ASSIGNMENT 3 Submit On-line to Connect
Due 1:00 pm, Wednesday, February 26, 2014
THIS IS PART 1 OF ASSIGNMENT 3. PART 2 IS ONLINE.
Grand Unified Theory of Statistics
Pre-Theory: One-sample test compare single sets of data to external standards no model is necessary
(z-test for p, t-test for mean, paired t-test for mean difference
COMM291 - Chapter 10 - Testing Hypotheses about Proportions
10.1 Hypotheses
- this is something that is supposed in order to draw a conclusion or inference for proof of the
point in question
- When lo
COMM291 - Chapter 2 - Data
2.1 What Are Data?
Data are the things given for us to turn into information.
- on its own, data can be very messy, you should sort it to at context in a data table
- The ro
0.30854
0.6915
69.15%
area to the left of a point
x, mean,sd, 1
or with true
given x -finding prob
area to right
precentage
0.9088
like the table just on excel:
to find the distribution under curve:
0
COMM 291
FINAL EXAM
SOLUTIONS
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Practice(Question(1A
Binary
Categorical
Nominal
Ordinal
Quantitative
Identifier
X
COMM 291 REVIEW SESSION
BY KENNY WU
T ABLE OF C ONTENTS
I.
II.
III.
IV.
V.
VI.
VII.
VIII.
IX.
X.
XI.
Data & Variables
Surveys & Sampling
Displaying Categorical Data
Displaying Quantitative Data
Correl
COMM 291 REVIEW SESSION
BY KENNY WU
T ABLE OF C ONTENTS
I.
II.
III.
IV.
V.
VI.
VII.
Condensed Pre-Midterm Material
Testing Hypotheses for Means
Comparing Two Means
Comparing Two Proportions
Goodness o
SD
Mean
1.6
Between
25 and
30
35
Right
Lef
Probability
0.99822195 or
99.82%
SD
Mean
8
Lef Side
200
And
185
Right Side
215
Right
Lef
Probability
0.06079272 or
6.08%
SD
Mean
100
Right Side
500
725
Right
COMM291 - Chapter 3 - Surveys and Sampling
3.1 Three Ideas of Sampling
Idea 1: Examine a Part of the Whole
- since it is not practical for most to interview whole population of a population, most inte
COMM291 - Chapter 9 - Sampling Distributions and Confidence Intervals for Proportions
9.1 Simulations
- a simulation is basically just pretending to test a random sample
- a simulation can help unders
COMM291 - Chapter 4 - Displaying and Describing Categorical Data
4.1 The Three Rules of Data Analysis
1. Make a Picture
- to display your data will help you see things you may not see in a table of nu
COMM291 - Chapter 6 - Correlation and Linear Regression
6.1 Looking at Scatterplots
- When looking at scatterplots what do you see?
- First you might say the direction of the association is important
COMM291 - Chapter 5 - Displaying and Describing Quantitative Data
5.1 Displaying Distributions
- distribution gives the possible values of a variable and the frequency/relative frequency of
each value
COMM291 - Chapter 7 - Randomness and Probability
7.1 Random Phenomena and Probability
- with random phenomena, we cant predict the individual outcomes but we can hope to
understand characteristics of
COMM291 - Chapter 8 - Random Variables and Probability Models
8.1 Expected Value of a Random Variable - 212
- a random variable is called an RV because its value is based upon outcome of a random
even
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Instructions
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Take Test: Assignment 3 - February 2017
Test Information
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e
COMMERCE 291 Lecture Notes 2014 Jonathan Berkowitz
Not to be copied, used, or revised without explicit written permission from the copyright owner.
Summary of Lectures 17 and 18
Chapter 14: Testing Di
SD
Mean
1.6
Between
25 and
30
35
Right
Lef
Probability
0.99822195 or
99.82%
SD
Mean
8
Lef Side
200
And
Right Side
215
185
Right
Lef
Probability
0.06079272 or
6.08%
SD
Mean
28
Right Side
120
155.8
Righ
COMMERCE 291 Lecture Notes Jonathan Berkowitz (copyright, 2014)
Summary of Lectures 6, 7 and 8
Chapter 6. Scatterplots, Association and Correlations
In Chapter 4 we examined the relationship between t
COMMERCE 291 Lecture Notes Jonathan Berkowitz (copyright, 2014)
Summary of Lectures 1, 2 and 3
Introduction
The word statistics comes from the Latin word for the state, because the first data
collecti
This is the CI from the two-sample z-test. It gives the same
conclusion as the chi-square test of independence earlier.
Why? Because a two-sample z-test tests the null hypothesis that
the proportions
Stat note compilation
Variable a characteristic recorded about an individual
Data specific values of a variable
Observations another word for data
Data table an arrangement of data in rows and columns
COMM 291 Application of Statistics in Business (JanApr 2014)
ASSIGNMENT 5 Submit On-line to Connect
Due 1:00 pm, Wednesday, March 26, 2014
Instructions and Advice:
IMPORTANT! Submit your solutions as