Homework Guidelines
Please read the following instructions carefully, as they will affect your
grade if not followed!
When is Homework due?
Homework is due by 5:00pm the due date of an assigned homework.
If you submit multiple sheets of paper for your as
DSCI 2010
Homework 1
Name:
Summer 2014
Section:
Show all your work for full credit and print JMP output whenever indicated!
1. Categorical or Quantitative? Classify each variable as categorical or quantitative.
(a) Salary of cashiers at a Colorado grocery
Business Statistics
Decision Sciences 2010
Spring 2013
DSCI 2010 (UCDenver)
Business Statistics
Spring 2013
1 / 78
Part I Chapters 14 and 12
Outline
Chapter 1 Introduction: What is Statistics?
Chapter 2 Data
Chapter 3 Describing Categorical Data
Chapter 4
Name:
EXAM I DSCI 2010 FORM A
Spring 2014
Show all your work and write complete and coherent answers.
You should bring to the exam a calculator capable of taking square roots. You may not use your
cellphone as a calculator.
Provide units for numerical
Formula Sheet Stat 226 Final
Summary Statistics
y1 + y2 + . . . + yn
1
y=
=
n
n
n
s2 =
yi
i=1
(y1 y )2 + (y2 y )2 + + (yn y )2
n1
=
1
n1
n
(yi y )2
s=
s2
i=1
Normal Calculations
x
x=z+
X N (, 2 )
Z N (0, 12 )
z=
Sampling Distribution
X N ,
n
2
x =
,
n
z=
EXAM II STUDY GUIDE DSCI 2010
Below is a study guide for material covered on Exam 2. Formulas available to you on the exam are
given on the corresponding Formula sheet.
1. Introduction Chapter 1
What is Statistics? distinction between descriptive and inf
WORKSHEET ~ HYPOTHESIS TESTING
. For each a and observed signicance level (p-value) pair, indicate whether the null hypothesis
would be rejected.
(a) or = 0.05,p-va1ue = 0.10 +9 teieoi z
(b) a = 0.10, p-value = 0.05 uh ' ~
(0) ox = 0.01, p-value = 0.001 i
DSCI 2010 HOMEWORK 3 SUMMER 2013
DUE WEDNESDAY, JULY 3
NAME: Summon; SECTION:
1. Sample size calculations: How many observations do we need? Al?
though sample size calculations were not separately discussed in lecture, we
have the tools to perform them. S