Stat 217 - Introduction to Statistical Concepts and MethodsSyllabus NotesCalendarsSyllabus Notes, cont.Office HoursWhy should I take Stat 217?What is Stat 217 all about?What should I take Stat 217?Slide 9What is this course about and why do I have to take it?Slide 11What will you learn in this class?What you will be asked to doWhat you will not be asked to doAdviceP. 3, Preliminary 2Definitions (p. 4, 5)Activity 1-3 (p. 6)ContinuationActivity 1-2 (p. 6)Coming up this weekIntroductions1Stat 217 - Introduction to Statistical Concepts and MethodsIntroductions2Syllabus NotesPlease bring text (or relevant pages) and calculator to every classHW assignments generally due on TuesdaysWill also be collecting in-class work (credit for participating, providing feedback)Tuesdays and Thursdays will meet in computer labExpected to bring USB drive to complete work outside of class (Thursdays)BlackboardLecture Notes pageCalendarsLast page of syllabusCalendar/Lecture Notes pageSyllabus Notes, cont.Graded workIn Class ActivitiesWeekly homeworks (individual write-ups)One free dropWeekly lab assignments (with partner)Pre-lab assignmentsStart in lab and finish outside of classTwo exams, cumulative final (mon or wed)Getting helpOffice hoursEmail (me, course listserv)Discussion Boards in BlackboardStat Club free tutoring4Office Hours5Why should I take Stat 217?67What is Stat 217 all about?Roper Poll: Does it seem possible or does it seem impossible to you that the … never happened“One in five people in the United States is open to the idea that the Holocaust is a myth.” – USA Today•83% said the Holocaust definitely happened•13% said it probably happened“Figure one out of five Americans could be willfully stupid” –San Francisco ExaminerGallup Poll: … did the Holocaust: definitely happen, probably happen, probably not happen, or definitely not happen?•22% said “it seemed possible” that it never happened8What should I take Stat 217?a Washington Post-ABC News poll indicatesa Washington Post-ABC News surveyWhy should I take Stat 217?9Parade Magazine, 9/20/2009What is this course about and why do I have to take it?10“Did you know that in just 6 weeks Cheerios can reduce bad cholesterol by an average of 4 percent? Cheerios is the only leading cold cereal clinically proven to lower cholesterol. A clinical study showed that eating two 1½ cup servings daily of Cheerios cereal reduced bad cholesterol when eaten as part of a diet low in saturated fat and cholesterol1 link1Johnston L, et al. cholesterol-lowering benefits of a whole grain oat ready-to-eat cereal. Nutr Clin Care, 1998; 1-6, 12.Why should I take Stat 217?11Parade Magazine, 1/3/201012What will you learn in this class?Determine reasonable ways to collect dataMake sense of numbersEvaluate claimsMake comparisonsDraw conclusionsSupport argumentsMonitor trends13What you will be asked to doInterpret, explain, justify, communicateUse algebra and computer as toolsPractice developing and using toolsTry things on your ownWork togetherAsk questions14What you will not be asked to doMemorize formulasManipulate equations without understanding where they came from, what they mean, or why they are usedRepeat back what I say to youModel: learning a foreign languageAdviceActively participateWork togetherAsk questionsReview along the wayStart assignments earlyTake the course seriouslyHave fun!Think!15P. 3, Preliminary 2Telephone companies constantly collect data on cell phone calls in an effort to detect anomalies that might indicate fraud. What information should you record about each cell phone call, in order to develop a profile for the cell phone owner so that you could then monitor calls for anomalies?16Definitions (p. 4, 5)Data = numbers in a contextVariable = any characteristic of a person or thing that can be assigned a number of categoryObservational unit = the person or thing being measuredVariability = variables take on different values from observational unit to observational unit17Activity 1-3 (p. 6)For each cell phone call, the researchers recorded information on its direction (incoming or outgoing), location (local or roaming), duration, time of day, day of week, and whether the call took place on a weekend or weekday.(a) Observational units(b) Categorical variables, binary(c) Quantitative variables18ContinuationWhat percentage of the class has used their phone today?Obs units?Variable?Any measurement issues?Other variables?Research questionsWhat conclusions would you like to draw?What are some comparisons you would like to make between groups of students in this class?19Activity 1-2 (p. 6)Obs units = 50 statesGender of state’s governorNumber of states that have a female governorPercentage of the state’s residents older than 65Highest speed limit in the stateWhether or not the state’s name contains one wordAverage income of the adult residents of the stateHow many states were settled before 186520Coming up this weekTopics 1, 3Review 1-1, 1-4, 1-6 (solutions under “Toolkit”)Begin class with review/questionsLots of terminologyVery critical for rest of termPractice, practice, practiceIssues in collecting data and drawing conclusions from a studyWhat population can I generalize the results to?Would it be reasonable to say a change in one variable is causing a change in the other variable?HW
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