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Unit 1 Seminar To resize your pods: Place your mouse here. Left mouse click and hold. Drag to the right to enlarge the pod. Welcome! Brief Syllabus Review Contact Information for Instructor Seminar Rules Discussion Each Unit – learning activities Reading Assignment in textbook Practice problems from textbook (not collected or graded) Ungraded tutorials (Very helpful if you don’t understand textbook) MML graded project Discussion questions (all week) Synchronous Seminar (or Seminar Option 2 Quiz) Instructor graded Project Due Dates: All learning activities for a unit are due by Tuesday 11:59 pm ET. Late penalties: (See syllabus for class policies) Contact me if you have a personal emergency situation. Instructor: Anne K. Geraci Email: [email protected] Office hours (AIM): ProfGeraci (See syllabus) or by appointment Please download and print the Kaplan Information Document from Doc Sharing Usual format of seminar will involve discussion of a concept and then responding to questions I post on the concept. Posting a wrong answer will not negatively affect your participation grade. It is more important that you try to participate rather than simply watch. Social posts (It is raining, Hi, Bye, My car broke down) will not help your participation grade. You are free to choose any or all of the available seminars: <<See syllabus for available seminars.>> Or you may select Seminar Option 2 – complete the MML Quiz. MyMathLab – “Ask my Instructor” Kaplan Math Center – live tutors & seminars Discussion Boards – ask for help Seminar discussions Internet resources Online Textbook (Use “Ungraded Tutorials/Multimedia Textbook”) Study Buddy (exchange e-mails) Statistics The science of collecting, organizing, analyzing, and interpreting data in order to make decisions. Larson/Farber 4th ed. 11 Population The collection of all outcomes, responses, measurements, or counts that are of interest. Sample A subset of the population. Larson/Farber 4th ed. 12 All US college students All televisions made during 2009 All golden retrievers All boxes of Fiber Crunch cereal The collection of college students in this class The 15 televisions you found at the electronics store this afternoon 20 golden retrievers visiting DogWorld today 50 boxes of FiberCrunch http://www.discover6sigma.org/post/2005/12/statistics-simplified/ Descriptive Statistics Involves organizing, summarizing, and displaying data. Inferential Statistics Involves using sample data to draw conclusions about a population. e.g. Tables, charts, averages Larson/Farber 4th ed. 16 Would this class be a representative sample of Kaplan University students? Population: All 20,000 Kaplan Students Would this class be a representative sample of Kaplan University students? Sample: Randomly selected 100 students (Parameters) Population (Statistics) Random Selection Sample Inference ALL individuals included that we wish to make conclusions about: Descriptive Statistics Sample selected to make conclusions about a larger group: Inferential Statistics Simple Random Sample Stratified Sample Cluster Sample Systematic Convenience Sample Sample Quantitative data Quantitative data has a value or a numerical measurement for which you can calculate sums, products and other numerical calculations. Qualitative data Qualitative data is grouped into a category or group. Sums, products or other numerical calculations do not mean anything. The base prices of several vehicles are shown in the table. Which data are qualitative data and which are quantitative data? (Source Ford Motor Company) Larson/Farber 4th ed. 22 Put data Level of in Measurement categories Arrange data in order Subtract data values Determine if one data value is a multiple of another Nominal Yes No No No Ordinal Yes Yes No No Interval Yes Yes Yes No Ratio Yes Yes Yes Yes Larson/Farber 4th ed. 23 Qualitative Data Nominal: Ordinal: Data is put in categories Data is put in ordered categories Quantitative Data Interval: Ratio: Data can be ordered and calculations made Data can be ordered, calculations made, and it has an absolute zero point •Number of worms? •Weight in grams •Internal temperature •Color •Variety http://www.gaysmills.org/orchards.html Two data sets are shown. Which data set consists of data at the interval level? Which data set consists of data at the ratio level? (Source: Major League Baseball) Larson/Farber 4th ed. 26 Interval level (Quantitative data. Can find a difference between two dates, but a ratio does not make sense.) Ratio level (Can find differences and write ratios.) Larson/Farber 4th ed. 27 At the end of each of my Powerpoint seminar lectures (PPT), you will find a number of selfstudy questions which you might find useful. I will not be covering them as part of seminar, but if we have time at the end of seminar, I am happy to answer questions. Identify the population and sample: A survey of 500 adults in the U.S. found that 54% drink coffee daily. A. Collection of the 500 adults surveyed B. Collection of all adults in the U.S. C. 54% D. 500 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson AddisonWesley Slide 129 Identify the sampling technique used: Students are classified according to major. Twenty students are selected from each major and asked how often they use the library. A. Random sample B. Stratified sample C. Cluster sample D. Systematic sample Copyright © 2007 Pearson Education, Inc. Publishing as Pearson AddisonWesley Slide 130 Identify the data set’s level of measurement: The salaries of nurses at a hospital. A. Nominal B. Ordinal C. Interval D. Ratio Copyright © 2007 Pearson Education, Inc. Publishing as Pearson AddisonWesley Slide 131 Identify the data set’s level of measurement: The nationality of each person on an airplane. A. Nominal B. Ordinal C. Interval D. Ratio Copyright © 2007 Pearson Education, Inc. Publishing as Pearson AddisonWesley Slide 132 True or false: The social security numbers of students in a class represent quantitative data. A. True B. False Copyright © 2007 Pearson Education, Inc. Publishing as Pearson AddisonWesley Slide 133 Population(B), Sample (A) Stratified Sample (B) Nurse’s salary: (D) Ratio Nationality: (A) Nominal Social Security Number: (B) False