STAT 2215
Homework 1
Chapter 2 Problems 12, 13, 14, 15
Problem 12] Marijuana Use During Pregnancy. For the birth weights of babies
in two groups, one born of mothers who used marijuana during pregnanc
STAT 2215
Homework 5
Chapter 7 Problems 12, 13, 15, 28
Problem 12] Suppose that the fit to the simple linear regression of Y on X from 6 observation
produces the following residuals: -3.2, 2.1, -4.0,
STAT 2215
HOMEWORK 3
Chapter 4 Problems 20, 21, 32
Zhidi zhang
Problem 20] Trauma and Metabolic Expenditure. For the data in Exercise 18 in Chapter 3:
Determine the rank transformations for the data.
STAT 2215
Homework 6
Chapter 8 - Problem 23, Chapter 9 Problem 12, 14
Chapter 8
Problem 23] Wine Consumption and Heart Disease. The data in Display 8.21 are the
average wine consumption rates (in lite
STAT 2215
Homework 2
Chapter 3 Problems 20, 22, 24, 32
Problem 20]
Use a calculator to solve all questions in this problem. You may refer to page 8 of Chapter 3
Classnote. However, those results are n
STAT 2215
Homework 4
Chapter 5 Problems 16, 17, 24
Problem 16] Spock Trial. Use a statistical computer package to obtain the analysis of variance
table in Display 5.10. Copy and Paste minitab outputs
STAT 2215Q
Homework #4
24. 1: the mean annual income in 2005 for 1st Quartile of IQ test taken in 1981
2: the mean annual income in 2005 for 2nd Quartile of IQ test taken in 1981
3: the mean annual in
STAT 2215Q
Homework #2
12. (a) 95% CI: (188.5464, 371.4536)
Confidence interval conclusion: We are 95% confident that 2-1 lies in the interval (188.5464, 371.4536).
(b) 90% CI: (203.4776, 356.5224)
Co
STAT 2215Q
Homework #1
16. (a)
This boxplot shows the gross domestic product per capita in 228 countries.
(b) Descriptive Statistics: PerCapitaGDP
Variable
PerCapitaGDP
N
228
N*
0
Mean
16018
SE Mean
1
Chapter 2 - 1
STAT 2215 CHAPTER 2
T-TOOLS
Chapter 2 - 2
Inference Using t-distributions
This chapter focuses on t-tools
These tools are often used in statistics, to make
inferences about your data
Chapter 7 - 1
STAT 2215 CHAPTER 7
SIMPLE LINEAR REGRESSION
Chapter 7 - 2
Recap from Previous Chapters
Chapters 1-5 covered methods for investigating the
relationship between a categorical (group) var
STAT 2215 CHAPTER 3
A CLOSER LOOK AT ASSUMPTIONS
Chapter 3 - 2
Recap
We previously covered some t-tools for
looking at the mean of a single group, or
comparing two groups.
One-Sample t-test, One-Sam
Chapter 4 - 1
STAT 2215 CHAPTER 4
ALTERNATIVES TO THE T-TOOLS
Chapter 4 - 2
Chapter 4 Goals
Introduce some alternatives to the t-Tools
Four distribution-free methods
Permutation test and Rank-sum t
Chapter 1 - 1
STAT 2215 CHAPTER 1
DRAWING STATISTICAL CONCLUSIONS
Chapter 1 - 2
The purpose of statistics is to examine data
to answer questions of interest.
Well focus on ways to make statistically
STAT 2215 CHAPTER 5
COMPARISONS AMONG SEVERAL SAMPLES
Chapter 5 - 2
OVERVIEW
The previous tools weve seen are useful for
making inference about a single mean, or
comparing the means of two different g
STAT 2215 CHAPTER 6
LINEAR COMBINATIONS AND MULTIPLE
COMPARISONS OF MEANS
Chapter 6 -
OVERVIEW
In the last chapter we discussed how to test the
equality of several group means. While these
tests are q