Notes for Statistics 3011 University of Minnesota Fall 2010 Section 007 Instructor: Craig Rolling
*Notes accompany the second edition of Statistics: The Art and Science of Learning From Data by Alan Agresti and Christine Franklin
Contents
CHAPTER 1: INTRO
Statistics 3011, Course Notes Supplement 3
October 4, 2010
Pregnancy Continued
Suppose that nationwide, 41% of all babies from rst pregnancies are born before the 40th week, and 62% of all babies from rst pregnancies are born before the 41st week. Note: T
STAT 3011
Section 007, Fall 2010
STAT 3011 Syllabus Course Description
This course provides an introduction to the basic methods of statistics. Topics will include descriptive statistics and graphs, probability concepts, the normal distribution, sampling
Stat 3011, Spring 2010
Sample Final Exam
Stat 3011: Sample Final Exam
Sample
Name: Instructions From Craig: This is a sample exam that was written by another instructor. The structure of our nal exam will be similar to this sample exam. Our exam may inclu
Sample Homework Problems Using R STAT 3011, Section 007 Friday, September 10, 2010
Problem 1. A 20-sided die a) Roll a 20-sided die 11 times, and use R to take the mean of the values an.d to d raw a boxplot of the values. Interpret it (note: we will learn
Stat 3011, Fall 2010
Sample Midterm 1
Section 1: Multiple Choice (8 Questions, 3 points each) For the multiple choice questions, circle one of the listed choices for each question (no explanation is needed). 1. Assume the number of calories in a McDonalds
Solution for Homework 3
Yicheng Kang
October 5, 2010
2.48
a) Upon examination of the data, the countries in Africa will have a larger standard deviation since the spread of the data is greater for this group than for the countries in Western Europe. b)Wes
Solutions for Homework 4
Yicheng Kang
October 12, 2010
5.19
a)The sample space for the possible genders of four children is FFFF,FFFM,FFMF,FFMM,FMFF,FMFM,FMMF,FMMM,MMMM,MMMF,MMFM,MMFF,MFMM, MFMF,MFFM,and MFFF. b)There are 16 possible outcomes, only one of
Homework 5 Solutions
Yicheng Kang
October 14, 2010
6.2
a) The probabilities for each possible outcome in the sample space are the same:1/36. There is only one instance in which the maximum is one. Thus, the probability is 1/36. There are three instances i
Homework 6 Solutions
Yicheng Kang
October 29, 2010
6.30
x = .75 which corresponds to a cumulative probability of 0.2266. x = .5 z= which corresponds to a cumulative probability of 0.6915. 0.6915 0.2266 = 0.4649(rounds to 0.46), the approximate proportion
6.3 Applications of Normal Distribution
Distributions
Objectives:
1. Find probabilities and percentages from known values.
2. Find values from known areas.
Overview:
This section presents methods for working with normal distributions that are not standard
Open access, freely available online
Essay
Why Most Published Research Findings Are False
John P. A. Ioannidis
Summary
There is increasing concern that most current published research ndings are false. The probability that a research claim is true may dep
Homework 9 Solutions
Yicheng Kang
November 18, 2010
Problem 9.21
9.21.a
The variable has two categories: (1)garlic being more eective; (2)placebo being more eective. And the parameter is the proportion of the population indicating that garlic is more eect
Solution for HK1
Yicheng Kang
September 16, 2010
Problem 1
Solution.
(a)
The R code is as following.
> MealCosts=c(10.00,2.40,6.50,3.25,6.70,2.00,6.00,3.00,4.00,0.85) > mean(MealCosts) [1] 4.47
(b) This is what you do in R.
> jpeg("C:/Users/Yicheng Kang/D
Solutions for HW 2
Yicheng Kang
September 28, 2010
1
a
Problem 2.4
Categorical
b
Quantitive
c
Categorical
d
Quantitive
2
a
Problem 2.6
Continuous
b
Discrete
c
Continuous
d
Discrete
1
3
a
Problem 2.8
Quantitive
b
Discrete
c
1216 + 710 + 1147 + 738 + 386 +
Statistics 3011, Course Notes Supplement 4
October 11, 2010
The Binomial Distribution in R
The dbinom function
Let X be a binomial random variable with number of trials n and probability of success p. That is, X Bin(n, p). Then dbinom(x=k, size=n, prob=p)
Statistics 3011, Course Notes Supplement 7
December 3, 2010
Chapter 10, Example 5 in Textbook
Example 5 in Section 10.1 of the textbook presents the following data on teenagers TV watching habits and whether or not they committed an aggressive act later i
Statistics 3011, Course Notes Supplement 6
November 29, 2010
Chapter 10 Recap and R Examples
In Chapter 10 we discussed methods of statistical inference to compare two population means. We learned how to measure the evidence against the theory that the tw
Conditional Probability Diagram for Example 5.5
Shaded = Moral Issues Most Important (20%)
Red = Voted for Bush (51%)
Box = S = Sample Space = All 2004 presidential election voters
A = Moral Issues Most Important (20%, shaded)
B = Voted for Bush (51%, red
Statistics 3011, Course Notes Supplement 5
October 27, 2010
Dice Game
Rules of the Game: You have two ways to win $20, but you must pick one or the other: Option 1: Roll a 20-sided die once, and predict the value before you roll it. If the value of the di