Lecture Notes Part 16
Contrasts
Multiple comparisons
READING SS Sections 6.16.5
Part 16: Contrasts
A contrast is a specic linear combination of population means
that is chosen to compare one population/group to another.
Formally, for some userselected c
HW 2
Gabriella Mickel
STAT 5301
February 8, 2016
Question 1. A company that sells running shoes online wants to compare two new marketing strategies. They will test the strategies on 10 weekdays. In the morning of each day,
a web page describing the comfo
Lecture Notes Part 2
Density curves
Normal distribution
Scatterplot
Correlation
Leastsquares regression
READING IPS Sections 1.32.3
Part 2: Density Curves
Descriptive statistics: We summarize only the data we have
collected
Inferential statistics: Based
STAT5301 Assignment 4
Due: September 30th, 2015
Answer all questions and submit the problems in order, making sure that the computer output and discussion
are placed together (do not put the computer output at the end of homework). Raw computer output is
STAT 5301 Autumn 2016, Homework 5
Due: Monday, October 10, 2016
Question 1. The Survey of Study Habits and Attitudes (SSHA) is a psychological test, administered to students, that measures attitude towards school. Scores range from 0 to 200. The
mean scor
Statistics 5301 Practice Midterm1 Questions
AU2012
1. Here are the 2007 health care expenditure per capita in the 35 countries with the
highest gross domestic product in 2007 in increasing order.
81
837
3323
4763
109
1035
3323
7285
233
1332
3357
286
1688
Stat 5301: Homework 2 Solution
1. There is a stereotype that women are more talkative than men. A study examines this
stereotype and collects data on the speech habits of 42 women and 37 men in the United States.
The data set talk.RData records the number
Stat 5301: Midterm 2
Tuesday, March 28, 2017
Name:
1. Please turn off cell phones and place them in your bag.
2. You may use one 2sided 8.511 inch sheets of formulas (of your own making).
3. You may use a calculator.
4. This exam booklet has a total of 9
Stat 5301 (Spring 2016)
Lecture 11 (Reading: IPS 7; SS 2)
11.1 OneSided and TwoSided Tests
11.2 (Pooled) TwoSample ttools
1 / 31
11.1 OneSided Vs. TwoSided Tests
any hypothesis test follows the same basic pattern:
1. set up hypotheses H0 vs. HA and
Stat 5301 (Spring 2016)
Stat 5301 (Spring 2016)
Intermediate Data Analysis I
Tests of significance/Hypothesis tests
Reading: The Statistical Sleuth (3ed), Chapter 1.
James B. Odei
The Ohio State University
Department of Statistics
404 Cockins Hall
1958 Ne
Stat 5301 (Spring 2016)
Stat 5301 (Spring 2016)
Intermediate Data Analysis I
R Coding Review
What is R?
James B. Odei
The Ohio State University
Department of Statistics
404 Cockins Hall
1958 Neil Avenue
Columbus, OH 43210
Office: 435 Cockins Hall
Office H
Stat 5301 (Spring 2016)
Stat 5301 (Spring 2016)
Intermediate Data Analysis I
Probability
James B. Odei
Chance experiments
The Ohio State University
Department of Statistics
404 Cockins Hall
1958 Neil Avenue
Columbus, OH 43210
Office: 435 Cockins Hall
Off
Stat 5301 (Spring 2016)
Stat 5301 (Spring 2016)
Intermediate Data Analysis I
Associations and the simple linear regression model
Motivation: Forbes boiling point of water dataset
James B. Odei
The Ohio State University
Department of Statistics
404 Cockin
Stat 5301 (Spring 2016)
Stat 5301 (Spring 2016)
Intermediate Data Analysis I
Obtaining Data
James B. Odei
The steps of statistics
The Ohio State University
Department of Statistics
404 Cockins Hall
1958 Neil Avenue
Columbus, OH 43210
Office: 435 Cockins
Stat 5301 (Spring 2016)
Stat 5301 (Spring 2016)
Intermediate Data Analysis I
Random Variables
James B. Odei
Random variables (RVs)
The Ohio State University
Department of Statistics
404 Cockins Hall
1958 Neil Avenue
Columbus, OH 43210
Office: 435 Cockins
Stat 5301: Homework 5 Solution
1. In a test for ESP (extrasensory perception), the experimenter looks at cards that are hidden
from the subject. Each card displays either a star, a circle, a wave, a square, or a cross. As
the experimenter looks at each of
Stat 5301: Homework 6 Solution
1. Suppose that 400 randomly selected OSU alumni were asked to rate the universitys counseling
services on a 1 to 10 scale. The sample mean (
x) was found to be 8.6. Assume that the
population standard deviation is known to
law of large numbers
I the law of large numbers is a central theorem in probability, which says that the
average of the values of a random variable X observed in many trials must
approach X
XT
[ for most r.us


.
I
nN
fix
I draw n independent observatio
Stat 5301 (Spring 2017)
Yunzhang Zhu
Lecture 2 (reading: IPS 1.3)
1 / 25
example: heights of U.S. women
I so suppose you were interested in studying the distribution of height in
U.S. women.
I to start, we select (at random, out of all U.S. women) 10 wome
Stat 5301 (Spring 2017)
Lecture 10 (Reading: IPS 7; SS 2)
10.1 One Sample ttools
10.2 The Sign Test
1 / 32
10.1 inference for a population mean with unknown
I we described two methods of inference for the setting where we draw n
observations from a norm
Stat 5301 (Spring 2017)
Yunzhang Zhu
Lecture 4 (Reading: IPS 3.1, 3.2; SS Chapter 1)
1 / 41
recall: key statistical tasks
I weve talked a little about summarizing and describing data
I today we focus on collecting data
2 / 41
collecting data
I most data i
Stat 5301 (Spring 2017)
Yunzhang Zhu
Lecture 8 (Reading: IPS 6)
8.1 Confidence Intervals
8.2 Hypothesis Testing
1 / 40
8 introduction
I Today we focus on the two main tasks of statistical inference, which is the process of
drawing conclusions from data
I
Stat 5301 (Spring 2017)
Lecture 9 (Reading: IPS 6)
9.1 Power and Inference as a Decision
9.2 Use and Abuse of Tests
1 / 25
9.1 power
I Consider testing H0 vs. HA .
I The defining property of a level test is that:
I What if HA is true?
I definition. The pr
Stat 5301 (Spring 2017)
Yunzhang Zhu
Lecture 5 (Reading: IPS 3.3, 4.12)
1 / 36
Toward Statistical Inference
I Example: Pew Research Study (August 916, 2016)
I
Surveyed 2010 U.S. adults by random digit dialing
I
Of these, 1587 (73%) were registered voter
Stat 5301: Midterm 1
Monday, September 26, 2016
Name:
1. Please turn off cell phones and place them in your bag.
2. You may use one 2sided 8.511 inch sheets of formulas (of your own making).
3. You may use a calculator.
4. This exam booklet has a total o
Stat 5301 Review for Midterm 1
1. Do women spend more time studying than men? We asked the students in a large firstyear college
class how many minutes they studied on a typical weeknight. Below are displayed: Histograms of
Study Time separated by Gende
Stat 5301 Review for Midterm 1
1. Do women spend more time studying than men? We asked the students in a large firstyear college
class how many minutes they studied on a typical weeknight. Below are displayed: Histograms of
Study Time separated by Gende
Stat 5301: Midterm 1
Thursday, February 16, 2017
Name:
1. Please turn off cell phones and place them in your bag.
2. You may use one 2sided 8.511 inch sheets of formulas (of your own making).
3. You may use a calculator.
4. This exam booklet has a total
Stat 5301: Homework 3 Solution
Instructions: Answer all questions and submit the problems in order, making sure that computer
output and discussion are placed together (when R is needed). Make it clear what parts of the
output are relevant and show how th
Stat 5301: Homework 7 Solution
1. Since previous studies have reported that elite athletes are often deficient in their nutritional
intake, a group of researchers decided to evaluate Canadian high performance athletes. A total
of n = 324 athletes from eig
Stat 5301: Homework 4 Solution
1. All human blood can be ABOtyped as one of O, A, B, or AB, but the distribution of
the types varies a bit among groups of people. Here is the distribution of blood types for a
randomly chosen person in the United States:
Stat 5301 (Spring 2017) Review for Midterm 2
1. A study based on a sample of size 36 reported a mean of 87 with a margin of error of 10 for 95%
confidence.
a. Give the 95% confidence interval.
The 95% confidence interval is:
(87 10, 87 + 10) = (77, 97)
b