Register now to access 7 million high quality study materials (What's Course Hero?) Course Hero is the premier provider of high quality online educational resources. With millions of study documents, online tutors, digital flashcards and free courseware, Course Hero is helping students learn more efficiently and effectively. Whether you're interested in exploring new subjects or mastering key topics for your next exam, Course Hero has the tools you need to achieve your goals.

4 Pages

STAT301_8.26.09

Course: STATS 301, Spring 2011
School: Purdue
Rating:

Word Count: 1213

Document Preview

is STAT 5th s f irst, Tuzov 301i n the table 8.26.09 Chapter 1, Lesson 2 Review of the types of Samples: Which type of sample is used for each of the following scenarios? 1.A study is conducted to find out how many undergraduates at Purdue own cars. It is known prior to the study that seniors are more likely to own cars than freshmen. The student population at Purdue is divided into freshmen, sophomores, juniors,...

Register Now

Unformatted Document Excerpt

Coursehero >> Indiana >> Purdue >> STATS 301

Course Hero has millions of student submitted documents similar to the one
below including study guides, practice problems, reference materials, practice exams, textbook help and tutor support.

Course Hero has millions of student submitted documents similar to the one below including study guides, practice problems, reference materials, practice exams, textbook help and tutor support.
is STAT 5th s f irst, Tuzov 301i n the table 8.26.09 Chapter 1, Lesson 2 Review of the types of Samples: Which type of sample is used for each of the following scenarios? 1.A study is conducted to find out how many undergraduates at Purdue own cars. It is known prior to the study that seniors are more likely to own cars than freshmen. The student population at Purdue is divided into freshmen, sophomores, juniors, and seniors and a random sample of 200 students is selected from each group. Stratified 2.The government wanted to gather some information on unemployment. They randomly selected 5 of the 50 states. From the 5 selected states they randomly selected 3 counties to participate in the study. They then selected 10 individuals from each of the counties to fill out their questionnaire. Multi-stage 3.Anne Landers asked people to send to her a response to the following question. Do you have children? If so, would you still have children knowing what you know now? Voluntary Response 4.Ashley wanted to determine the average height of Purdue women students. She did not have the time to measure all Purdue women students height so she randomly selected 50 Purdue women students and measured each students height and averaged the 50 heights. Simple Random Tony wanted to know how many bears lived in Anchorage, AK, in the summer. With some help, he caught, tagged, and released 50 brown and black bears in a one week period. With some help, he caught 55 bears in another one week period of which 10 were tagged. Capture Release 50N= 1055 Thus: N = 275 How do you select the units in the sample? You can use SPSS or the random number table in the back of the book (Table B). Which way is MORE random? Both methods are equally random. Example: A club has 12 members. They are: Gundlach Remke Howell Brenneman Xu Reeger Cline Mehta Tuzov Daye Zheng Kuiper Use the random number table (Table B) starting at line 130 to take a SRS of 4 members. take every two numbers without skipping Table B starting at line 130: spaces 69051 05007 68732 45740 64817 16632 55259 41807 87174 81194 84292 65561 09517 14873 08796 33302 84534 04197 43165 07051 06489 85576 93739 93623 87201 45195 31685 18132 97245 96565 97150 09547 69051 05007 68732 45740 64817 16632 55259 41807 87174 81194 84292 65561 09517 14873 08796 33302 84534 04197 43165 07051 06489 85576 93739 93623 87201 45195 31685 18132 97245 96565 97150 09547 Strategy: Give all of our names numbers in order from 01 through 12. Then look at our randomized numbers from Table B. Draw a line under every 2 digits. The 1st 4 unique (not repeated) 2-digit combinations which are between 01 and 12 are your sample. Tuzov Cline Remke Howell Problems with sampling Undercoverage: occurs when some groups in the population are left out of the process of choosing the sample Nonresponse: occurs when an individual chosen for the sample cant be contacted or does not cooperate Response Bias: occurs when the behavior of the respondent or interviewer changes the sample results (examples include the respondent lying, the race or sex of the interviewer influencing the respondent, faulty memory of the respondent, poor interviewing technique, wording of questions) Examples: (Problem 3.55, p. 260) Comment on each of the following as a sample design or a potential sample survey question. Is there any source of bias? What type of bias? 1. A survey used the following question: Do you agree that a national system of health insurance should be favored because it would provide health insurance for everyone and reduce administrative costs? a. Response Bias 2. Alex wanted to find out peoples opinions regarding Greater Lafayette Health Services desire to build a new hospital. Consequently, he took a simple random sample of 500 Lafayette and West Lafayette residents listed in the phone book. He is concerned however that those not listed in the phone book may have different a. views. Undercoverage 3. When Alex attempted to collect data from those who made it into his sample, he was unable to contact some of them and others refused to answer his survey questions. a. Non-responsive Anecdotal evidence Supposed data based on haphazardly selected, individual cases, which often come to our attention because they are striking in some way. Concluding from anecdotal evidence is NOT good science! Data Readily available information to answer our questions Available Data Data produced in the past for some other purpose but that may help answer a present question and, many times, is quite good and useful data. Observational study Observes units or individuals, usually a sample of all units, and measures variables of interest but does not attempt to influence the responses. We let nature take its course and observe the response. We do not manipulate the units in any way. Experiment Deliberately imposes some treatment on individual or units in order to observe their responses. In an experiment, we are always interested in the influence of one or more variables or factors on the response. We always manipulate the units in that treatments are imposed on the units. Experiments often lack reality Example: Which of the following is an experiment and which is an observational study? 1. To determine whether a review session will improve his students test scores, a stat 301 instructor divides his class into two groups. He then requires one group to attend a study session. He compares the test results of each group. Experiment 2. To determine whether a review session will improve his students test scores, a stat 301 instructor announces a study session to be held the night before a test. The instructor lists the students who attended the session and compares their scores to the remaining stat 301 students scores. Observation Problems with experiments: lurking variable, placebo effect, bias, lack of realism How to make experiment as real as possible Control Group Group of patients who receives a sham treatment (sugar pills instead of the medicine). Double-blind Neither subject nor the experimenter knows whether they are in the treatment or control group until the experiment is completely finished. (This avoids unconscious bias by the experimenter.) Randomization Rely on chance to divide experimental units into groups that does not depend on any characteristic of the experimental units and that does not rely on the judgment of the experimenter in any way Replication Use enough experimental units to reduce chance variation. Experimental Terms Experimental Unit The individual or units on which the experiment is done. Often, these units are chosen randomly from the population of units. With Humans, Units are called subjects. Treatment Specific experimental condition applied to the units. Factors The explanatory variable(s) under study. Factor Level Specific value of a factor. Response Variable What is being measured on each unit/subject. Example SPSS: Our 12 club members need to learn a new SPSS technique. An ITaP computer trainer thinks playing classical music in the background helps people to retain information better. Another ITaP computer trainer believes drinking coffee while training helps. Their boss decides to design an experiment to test out their theories. He will divide the club members into 4 groups and then give them a multiple choice test about the new SPSS technique. a) What are the factors and their levels? Coffee or Music What are the treatments? Four possibilities: Coffee and music, just music, just coffee, neither What are the units/subjects? 12 club members and 4 treatments: need 4 groups What is the response variable? How well they learned Is the response variable categorical or quantitative? Quantitative: defined by a number Depends how test is measure f) b) c) d) e) Outline the design of the experiment. What type is it? SRS
Find millions of documents on Course Hero - Study Guides, Lecture Notes, Reference Materials, Practice Exams and more. Course Hero has millions of course specific materials providing students with the best way to expand their education.

Below is a small sample set of documents:

Purdue - STATS - 301
STAT301 8.24.2009 Lecture 1, Chapter 3, Section 2.6Statistics is not math. It is the science of collecting, organizing, and interpreting information, which we call data, with the goal of gaining understanding from the data. This is a critical thinking cl
Purdue - STATS - 301
Purdue - STATS - 301
For each story in problems 1-5, choose whether a confidence interval (CI) or hypothesis test (HT) is most appropriate, which type of problem it is, and the appropriate distribution. Choices for type of problem: A. 1-sample mean B. Two-way ANOVA D. 2-sampl
Purdue - STATS - 301
STAT 301 (Traditional and Online) SYLLABUS for Fall 2008 INSTRUCTOR: EMAIL: OFFICE: OFFICE HOURS: FRIDAY LAB T.A.: Mr. Thomas Howell thhowell@stat.purdue.edu MATH 234 Monday and Wednesday, 9-10:00am.Any student may attend the office hours of any STAT 301
Purdue - STATS - 301
Lecture 9, Chapter 12 One-Way Analysis of Variance:It is always interesting to compare data (salaries of women and men, responses to different treatments in a clinical trial). We have learned to display comparisons with back to back stemplots and side-by
Purdue - STATS - 301
Lecture 2 Section 1.1 Looking at Data There are two components in looking at or describing data: Individuals (units) are objects described by a set of data. A unit can be a person, a place, or a thing (ie. a student, the city of West Lafayette, Purdue Uni
BYU - PSYC - 100
Chapter11Outline ProfessorLeBreton:PSYC120MotivationandEmotion Chapter11 Motivation:processthatcausesmovementeithertowardagoalorawayfroman unpleasantsituation Drive:internalstatethatarisesinresponsetoaneed Instinct:unlearnedcharacteristicpatternsofrespon
BYU - PSYC - 100
Theories of PersonalityChapter 12PersonalityPersonality: Stable ways of behaving thinking and feeling How is our personality formed? What makes up our personality? What makes each personality different? How can we use personality research to better und
BYU - PSYC - 100
Chapter 13 Social PsychologySocial Psychology (Huge Purdue Program ) Our perception of othersAttributions (why and why people do things. What are you going to a ttribute this action to?) a ttribute differently when attibuting others' behavior and your
BYU - PSYC - 100
PSYC 120 Chapter 14: Professor LeBretonChapter 14Abnormal PsychologyDefinition*Abnormal Behavior/ Mental Disorder: actions, thoughts and feelings that:1. Are outside of cultural norms (be careful with this one!)2. Cause emotional distress 3. Cause d
BYU - PSYC - 100
PSYC 120 Chapter 15: Professor LeBretonChapter 15Treatment and TherapyPsychotherapy*Definition:*People enter therapy in order to rid themselves of an abnormal behavior or to improve their daily living (personal growth)Psychodynamic Therapy*Psychoan
BYU - PSYC - 100
PSYC 120 Professor LeBretonChapter 4Human Development I Introduction Development: Predictable changes associated with increasing ageDevelopmental Psychology: focuses on human development across the lifespan Maturation: Systematic physical grouth of the
BYU - PSYC - 100
Chapter 5Sensation and PerceptionSense Organs*SenseOrgans: organs that receive stimuli*Sensory Receptor Cells: specialized cells within the sense organs that sendneural impulses to the brainSensation Vs. Perception*Sensation:information coming in
BYU - PSYC - 100
ConsciousnessChapter 6 Consciousness:Everything of which we are aware at any given time Thoughts Feelings Sensations External stimuliAltered State of Consciousness*Changes in awareness produced by Sleep Meditation HypnosisThe Influences of Circadian
BYU - PSYC - 100
Chapter 7LearningClassical Conditioning*The story of Pavlov and his dogs lead to a breakthrough in learning theory that is now called Classical Conditioning*Unconditioned Stimulus (UCS): stimulus that can elicit an unlearned response (an instinctual s
BYU - PSYC - 100
MemoryChapter 8Memoryo The capacity and structures used for the retention and retrieval of information o Involves three processes: Encoding Storage RetrievalThe Three Box Model of Memoryo The processing of memories goes through three areas: 1. Sensor
AD 227 Francisco Goya, Third of May -commemoration of Revolt -example of war, Heroic Struggle of the Common ManGoya, Saturn Devouring one of His Children -After going deaf, self exiled to france -large depressing frescoesGoya, The Dog -not understood -d
AD 277 Exam Monday Jacques Louis David, Coronation of Napoleon -neo-classical style -crowning himself emperor -enormous paintingDavid, Napoleon Crossing the Alps -actually rode on a mule -compared to HannibalAntonio Canova, Paoline Borghese is Venus -si
AD 227Jacques Louis David, Oath of Horatii -classical scene -idealized version of Roman historyJacques Louis David, Self-Portrait -involved with French Revolution -propaganda managerJacques Louis David,The Death of Marat -1793, Monument to French Revol
AD 227Vermeer, The Milkmaid -not realistic because of colors of clothing -servants didn't wear expensive clothing -use of camera obscura (circles of confusion)Willem Kalf, Still life with a Late Ming Ginger Jar -still life -highly detailed -showing off
AD 227Vermeer, The Milkmaid -not realistic because of colors of clothing -servants didn't wear expensive clothing -use of camera obscura (circles of confusion)Willem Kalf, Still life with a Late Ming Ginger Jar -still life -highly detailed -showing off
AD 227 Rembrandt -had to bury his own children and wife -would lose all income if married again, wife's willJacob Van Ruisdael, View of Haarlem from the Dunes at Overveen -specialist in landscape painting -shows overview of linen productionVermeer, View
AD 227Judith leyster, Self-Portrait -student of Frans Hals -specialist in genre pictures -stopped painting after marriage -fell out with Frans Halls, Legal dispute over stolen apprenticeGerrit Van Honthorst, Supper Party -moral undertone - allusion to h
AD 227 17th Century Europe -Circle of trade (netherlands -&gt; Americas -&gt; Africa) -growing merchant middle class Flanders -Souther Catholic area -modern country of Belgium Peter Paul Reubens -Known as the Bernini of the NorthReubens, Self-portrait -present
AD 227 Artemisia Gentileschi, Judith Slaying Holofernes -famous woman painter, one of the first -followed Cravaggio's syle -created somewhat violent paintings because of rapeArtemisia Gentileschi, Self Portrait -painting herself as an allegorical figure
AD 227El Greco, The burial of Count Orgaz (continued) -lower zone and upper zones (earthly/heavenly events) -two seperate styles (realistic vs mannerist exaggeration)El Greco, Assumption of the Virgin -unusual colors -mannerist style Ch 19 Italy and Spa
AD 227Quenten Massys, Money-Changer and His Wife -high amount of detail -wife distracted by money, jewelry -genre scene -moralistic overtone -realism, Northern preoccupation -Mirror, reflecting church steeplePieter Aertsen, Butcher's Stall -inverted com
AD 227 Ch 17 Italy, 1500-1600 Rome has Renaissance and Baroque Monuments -Protestant reformation creates division - who pays for what kind of art - catholic church counter-reformationLeonardo Da Vinci, Last Supper, 1495-1498 -oil and tempera on plaster -
AD 227 -Test Friday - 40 multiple choice slides -identifying artist, info Sandro Botticelli, Adoration of three Kings -florenceBirth of Venus, 1484 -one of the most iconic pictures of renaissance -flat painting, doesn't worry about realism -decorative li
Jan Van Eyck, Giovanni Arnolfini and his Bride, 1434 -oil on wood -signature on back wall -oranges on window sill, sign of wealth -two full bodied portrait unusual for time eriod -confusing origin of picture, wedding or engagement portrait? -hand being he
Important Artisian Elements to Observe Test on CH 14-17 -attention to the human form including the return of classical nudity and contrapposto (influence of classical roman statues) -discovery and evolution of Linear perspective to create the illusion of
Ad 227 First Test: Feb 11th Second Test: March 25th -multiple choice Robert Campin, Merode Altarpiece -1425-1428 -oil on wood -shows a &quot;modernized depiction of Biblical story (annunciation) -angel coming in on 7 rays of light -people on sidepanel are patr
AD 227 cla.purdue.edu/courses/ad/arthistory/default.htm Duccio Di Buoninsegna, Virgin and Child Enthroned with Saints-Huge Panels -Maesta Altar Piece -Siena, Italy, 1308-1311 -Siena adopted the virgin as their patron saint -moving towards more realistic
AD 227 Florence - central power, birthplace of many innovations -regions competing for power and control Humanism - interest in life in the natural world -artists begin to depict human emotion Fresco -on plaster waal in different degrees of fineness -extr
Gardner's Art Through the Ages: The Western Perspective Introduction: What is Art History Chronology - the dating of art objects and buildings Physical evidence - often reliably indicates an object's age Documentary Evidence - can help pinpoint the date o
Georgia State - POLS - 1101
T urkey Leader- Abdullah Gul Capital- Ankara GDP- \$11,200 Religion-Muslim 84%, Export- apparel, textiles, metals, manufactures, t ransport equipment Imports- machinery, chemicals, semi-finished goods, fuels, t ransport equipment Lebanon Capital- Beirut Re
Georgia State - POLS - 1101
Click to edit Master subtitle styleZoe FernandezUnited Arab Emirates (UAE)4/9/11LeaderPresident is Khalifa bin Zayed Al Nahyan. (Sheikh Khalifa) Became president on 3 November 2004, following the death of his father, Zayed bin Sultan Al Nahyan. Emir
Georgia State - POLS - 1101
Zoe Fernandez Amendment I Your rights are limited when you are talking to a police officer. When someone says something, and then you disagree with them with explicit language your freedom of speech is limited on what you can say. It also depends on where
Purdue - AGC ANSC - 102
Purdue - AGC ANSC - 102
Purdue - AGC ANSC - 102
Purdue - AGC ANSC - 102
Purdue - AGC ANSC - 102
Reproductive Physiology Reproductive PhysiologyDr. Mickey A. Latour Purdue University, Smith Hall, West Lafayette, IN 47907Reproduction Reproduction The following topics will be discussed:- Male reproduction Male - Female reproduction - Embryonic Deve
Purdue - AGC ANSC - 102
ReproductionAllantois-An intermediate fetal membrane which contributes to the formation of the umbilical cord and placenta. Also, the allantochorion refers to the membrane formedAmnion-The intermost placental membrane surroungind the embryo which contai
Purdue - AGC ANSC - 102
Purdue - AGC ANSC - 102
Purdue - AGC ANSC - 102
Purdue - AGC ANSC - 102
Purdue - AGC ANSC - 102
Purdue - AGC ANSC - 102
Purdue - AGC ANSC - 102
Purdue - AGC ANSC - 102
Purdue - AGC ANSC - 102
Purdue - AGC ANSC - 102
Purdue - AGC ANSC - 102
Yorkshire
Purdue - AGC ANSC - 102
Welsh
Purdue - AGC ANSC - 102
Tamworth
Purdue - AGC ANSC - 102
Lacombe
Purdue - AGC ANSC - 102
British Lop
Purdue - AGC ANSC - 102
British Landrace
Purdue - AGC ANSC - 102
Berkshire