SOLUTIONS TO LAB ASSIGNMENT 3
Question 1
(a) The 11 subjects constitute a subset of a larger group of 16 individuals who believed they were addicted
to caffeine and agreed to participate in the study. As the subjects are volunteers, they cannot be treated
LAB 1 ASSIGNMENT
DISPLAYING AND DESCRIBING DISTRIBUTIONS
In this lab assignment you will use statistical features in StatCrunch to study the wealth of the worlds richest
people in 2007. In particular, you will learn how to display the related categorical
Wei Song
1413835
LAB ASSIGNMENT #3
STAT 151
LEC A1
1.
(a) From the histogram, when it stops at 100, we can see that the data are mostly greater than
the distribution. The mean of the data is slightly greater than the mean of the distribution.
The standard
SECTION 2: GATHERING DATA AND RESEARCH DESIGN
[Chapters 11 13 in textbook]
2.1 Populations and Samples
[Some of these terms were introduced in Section 1]
Population = the entire collection of all individuals or items under consideration or which are of
in
LAB 3 INSTRUCTIONS
ONE-SAMPLE AND TWO-SAMPLE INFERENCES
The primary purpose of the lab instructions is to demonstrate how the inferential tools in StatCrunch can be
applied to one-sample and twosample problems about the mean and the difference in two popu
Wei Song
1413835
LAB ASSIGNMENT #4
STAT 151
LEC A1
1.
(a) The solution of the study cannot be generalized to other young elderly subjects,
because they are not random. To make the inferences, the smaples need to be
chosen randomly and the remaining variab
LAB 3 ASSIGNMENT
INFERENCES FOR ONE AND TWO-SAMPLE PROBLEMS
In this lab assignment you will learn how to examine data produced in a simple statistical experiment. In
particular, you will examine the experiment design and apply graphical, numerical, and in
SOLUTIONS TO LAB 3 ASSIGNMENT
The lab assignment based on a Java applet is developed to make students understand better the concept of
sampling distribution. As the random number generator used in the applet does not have a seed feature, it is
not possibl
Ch. 3 Intro to Correlation and Regression
Ch. 2 deals with univariate data. This chapter, however, considers bivariate data and
how two numerical variables are related. Methods of description are introduced here and
formalized in Ch. 11.
Terminology:
x
Ex
LAB 1 ASSIGNMENT
DISPLAYING AND DESCRIBING DISTRIBUTIONS
In this lab assignment you will use graphical and numerical tools in StatCrunch to see how accurate
weighing trucks in motion can be. In particular, you will display the related data using histogram
Wei Song
1413835
LAB ASSIGNMENT #2
STAT 151
LEC A1
1.
(a)
(b) For 1, the
IQR is 15.
skewed.
center is 130. The
The
shape
is
For 2, the center is 132. The IQR is 42. The shape is nearly symmetric.
The center of 1 and 2 is very similar, but there is a big d
Chapter 28: Analysis of Variance
In this chapter, we will talk about:
Hypothesis tests about the equality of two or more population means An analysis of variance (ANOVA) table for a one-way layout
Suppose there are k populations. Let, for i = 1, 2,. , k
Statistics 1x1 Chapters 14-15 Introduction to Probability Mike Kowalski
Chapter 14 - 15 Examples: Introduction to Probability
1.
Four Card Game: Consider a game that consists of dealing out two hands of two cards from a deck of four
cards. The deck contai
SOLUTIONS TO LAB 1 ASSIGNMENT
1.
First discuss the data in the file. How many cases are there? Identify categorical and quantitative variables in the
data. What is the identifier variable?
The data table consists of 1309 cases, each corresponding to a sin
Wei Song
1413835
LAB ASSIGNMENT #5
STAT 151
LEC A1
1.
(a) The population is the 120 students who participate in the midterm exam. The
subject is student. The response variable is midterm score. The factor is the strategies.
The level of factor is C, H, Q,
SOLUTIONS TO LAB ASSIGNMENT 4
Question 1
(a)
The 17 volunteers, 9 elderly and 8 young subjects, were not selected from any well-defined
populations. Therefore the results of the study cannot be generalized to any populations. The
results can only be appli
Wei Song
1413835
LAB ASSIGNMENT #1
STAT 151
LEC A1
1.
(a)
The
shape of the histogram
is right skewed. The median is 50.The IQR is 40. The variable AGE does not
distribute evenly throughout the range because the graph goes down as the age
increases. Approx
SOLUTIONS TO LAB ASSIGNMENT 4
Question 1
(a) According to the information provided in the story, the 36 women were volunteers. As there is no
random sample, formally the results apply only to the 36 women who participated in the study. The
results cannot
Stat 151 Practice Final 1s Mike Kowalski
Statistics 151 Practice Final 1s
Instructions:
1.
This is a closed book exam.
2.
You may use the STAT 151 formula sheets and tables provided and a NON-PROGRAMMABLE calculator only.
3.
You have 120 minutes to comple
STAT151C2
LAB2
FESCHUK,Anastasia
Question1:
a)
Iexpectalinearrelationshipbetweenthecaratageandpriceofthediamonds,becauseasthecaratage
increasesinthedata,thepricealsorisesfairlysteadily.
b)
Therangeofvaluesforcaratageofthediamondsis0.181.1
Therangeofvalues
Ch 2: Displaying and Describing Categorical Data
2.1 One Categorical Variable
It is very unlikely that we can draw conclusion about a variable
simply by looking at raw data. Thus, it would be beneficial to
summarize the raw data into a more manageable for
Ch 1: Stats Starts Here
1.1 What is (are) Statistics?
- Statistics (the discipline) is a way of reasoning, along with a
collection of tools and methods, designed to help us understand
the world with the use of data.
or
- Statistics (plural) are particular
Ch 11 13 Gathering Data
Ch 9 11 Gathering Data
Does a Census Make Sense?
- Census is a special sample that includes everyone and
sample the entire population.
- There are problems with taking a census:
o Cost
o Undercount
o Time
o Complexity
Recall: Popul
LAB 3 ASSIGNMENT
INFERENCES FOR CATEGORICAL DATA
In this lab assignment, you will apply the summary and inferential tools for categorical data in StatCrunch to
data from a world-wide survey on atheism. In particular, you will obtain summary statistics to
STAT 151
INTRODUCTION TO
APPLIED STATISTICS I
MAJID NABIPOOR
CAB 622
nabipoor@ualberta.ca
(Ch.9,10,11)
1
What is statistics?
Many processes in nature (chemical, economical,
agricultural, etc.) follow laws that are not exact, but
are subject to a certain a
Chapter 2. Displaying and Describing Categorical Data
2.1 One Categorical Variable
After categorical data has been sampled it should be summarized
to provide the following information:
1. Which values have been observed? (red, green, blue, brown,
orange,
LAB 1 ASSIGNMENT
DISPLAYING AND DESCRIBING DISTRIBUTIONS
In this lab assignment you will use exploratory tools in StatCrunch to study the wealth and life expectancy in
97 countries. In particular, you will learn how to display the related categorical and
SOLUTIONS TO LAB 1 ASSIGNMENT
Question 1
(a)
The contingency table is shown below:
First we examine the distribution of 91 countries across the seven GNP levels. The column totals
show that 63 out of 97 countries (69.23%) have GNP values in the lowest ran
Stat 151 Practice Final 2
LAST NAME: _
FIRST NAME: _
STUDENT ID: _
Instructions:
1)
2)
3)
4)
5)
6)
Personal items must be placed aside prior to the start of the exam.
All portable electronic devices must be turned off, including cell phones, pagers, etc.
Stat 151 Practice Final 2
LAST NAME: _
FIRST NAME: _
STUDENT ID: _
Instructions:
1)
2)
3)
4)
5)
6)
Personal items must be placed aside prior to the start of the exam.
All portable electronic devices must be turned off, including cell phones, pagers, etc.
Stat 151 Practice Midterm 1
LAST NAME: _
FIRST NAME: _
STUDENT ID: _
STAT 151 SECTION: _
Instructions:
1) Personal items must be placed aside prior to the start of the exam.
2) All portable electronic devices must be turned off, including cell phones, pag
Stat 151 Practice Final Lab Questions
The following two questions refer to the materials that were used in the Lab 3 Instructions,
Inferences for Categorical Data.
We obtained the following 95% confidence interval result from the Titanic data:
1) Assume t