1
Decisive Workbook
2013 by Chip Heath and Dan Heath.
Concepts drawn from the book Decisive, published March 2013.
How to use this workbook
This guide is intended to be used as a supplement to the book Decisive. It
does not stand alone; if you havent rea
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1
Consultant Name:
We are contacting you and your firm again at the request of our client for an expert opinion and
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STAT 3480 Homework 02
Maxwell Chang
Problem 01, Textbook 2.1
If were given two groups of 4 from 8 distinct observations, where group 1 is given treatment 1 and group 2 is
given treatment 2, and we want to find treatment 1 observation > treatment 2:
H0 : u
STAT 3480: Lab 07 Summary
Maxwell Chang (mhc8bf)
Part 1
In evaluating whether theres a relationship between movie rating and score on rottentomatoes.com, we first
performed a Kruskal-Wallis test as a sort of exploratory technique. The Kruskal-Wallis test
STAT 3480: Lab 07
Maxwell Chang (mhc8bf)
Part 1
choose(4,2)
# [1] 6
If we have 4 groups (i.e. G, PG, PG-13, R), we will have 6 pairwise combinations. In general, if we have K
treatment groups, well have a total of (K, 2) combinations (K choose 2).
Part 2
Lab 02
Maxwell Chang
Problem 1
day_1 = 147.8 #Unseeded
day_2 = 489.1 #Seeded
day_3 = 119.0 #Seeded
small_seeded = c(day_2, day_3)
original = print(mean(small_seeded) - day_1)
# [1] 156.25
While there is a difference between the two groups, it should be no
Homework 03
Maxwell Chang
February 25, 2016
Section 2.9 of the textbook deals with selection of two-sample test.
Youd select a t-test if the CDF of the two samples are normal with uknown but equal variances to test for
differences between two means. The t
STAT 5120: Assignment 07
Maxwell Chang (mhc8bf)
Problem 1
Part 1
full = lm(PAY~SPEND+AREA+SPEND:AREA, data = data)
anova(full)
#
#
#
#
#
#
#
#
#
#
Analysis of Variance Table
Response: PAY
Df
Sum Sq
Mean Sq F value
Pr(>F)
SPEND
1 608555015 608555015 117.78
STAT 5120 Applied Linear Models
Maxwell Chang (mhc8bf)
Assignment 04
Problem 01, Textbook 3.12
a) The coefficient for gender is positive, which value is 1 if the employee is male. This
means, if all things are kept constant, males are paid more than femal
STAT 5120 Applied Linear Models
Maxwell Chang (mhc8bf)
Assignment 02
Problem 1, Textbook 2.9
(a)
2
sY =
1
SST , where SST = SSE + SSR. From the table, SST = 0.09, so s 2 =0.005 . We also
Y
n1
2
know that the correlation r xy , which Cov(X,Y), is related t
Homework 1 - Correction
Maxwell Chang
Problem 1.1
H0 : The median of the simulated exam scores is 70.
Ha : The median of the simulated exam scores is greater than 70.
The binomial test supports the hypothesis that the sample median is greater than 70 with
1
Statistics 3559
Chapter 0
2
Section 0.1
Cumulative Distributions and Probability Density Functions
Terminology Review:
Random Sampling Ex. Process of drawing numbers at
random from a large basket of numbers
Statistical Population: hypothetical basket
1
Statistics 3480
Chapter 1
January 28
2
Section 1
One-Sample Methods
Chapter 1 will cover some simple nonparametric tests of
hypotheses and condence intervals based on the binomial
distribution.
We will discuss an example where a nonparametric test may
BMED 652-001 (1 credit)
Biomedical Career Pathways
Fall 2015
TR 3:15-4:15 pm
Bull Run Hall 131
Course objective: This series of presentations, homework assignments and exercises is designed to guide students in
understanding and making career choices in t
ESSAY HOMEWORK
INSTRUCTIONS: Each student will write a personal statement (essay) suitable for the type of school s/he will be applying
to (DDS, MD, DO, DVM, etc.) An essay written for a past (or current) application cycle may be used. You may also
substi
Study Skills Calendar
INSTRUCTIONS:
Name _Sungmin Choi_
Plan your week beforehand, for studying, recreational activities, chores, classes, in one hour blocks. Be specific where possible.
On the second page, keep a record of how you actually spent your t
Study Tips Homework
Name:
Sungmin Choi
At this level, quantity is an issue. Learn to adapt.
Schedule one week at a time, by the hour.
Schedule 35 or more hours of study time per week
Schedule at least 2 hours on each day (35 minimum/week)
Spend 50 minutes
INTERVIEWER: Sungmin Choi
INTERVIEWEE:
INSTRUCTIONS Each student will interview and be interviewed twice. A separate report must be turned in for each
interview. The interviewer should write seven unique interview questions for each interview, based on ma
INTERVIEWER: Sungmin Choi
INTERVIEWEE:
INSTRUCTIONS Each student will interview and be interviewed twice. A separate report must be turned in for each
interview. The interviewer should write seven unique interview questions for each interview, based on ma
INTERVIEWER:_Jae Ru_ INTERVIEWEE:_Sungmin Choi _
INSTRUCTIONS Each student will interview and be interviewed twice. A separate report must be turned in for each
interview. The interviewer should write seven unique interview questions for each interview, b
Instructions for article interpretation assignment:
Summary: find an article from the medical literature, summarize it, and give details as to the statistics used.
Details: You need to go through the medical literature (= medical journals) and find an art
Homework # 5
Note: Please circle your answers when appropriate!
Note - there are more problems here than usual, but most of them are really pretty simple.
1) 10.3, p. 399 (10.3, p. 392) cfw_9.4.3, p. 357. But use a non-directional (two sided) test.
2) 10.