advertisement

Unit 1 – Day 1 Preliminaries • Introductions/ roll (any peanut allergies?) • Textbooks • Course expectations/ student info • Course format • How to be successful • Honor Code Lesson Objectives At the end of the lesson, students can: • Describe the distribution of a variable • Determine types of variables • Display variables graphically • Describe the overall pattern of a distribution Foundational Definitions Statistics: Individuals: Variable: Example: Individual – Students at BHS Variables - Types of Variables Categorical (Qualitative): Example: Quantitative: Example: Types of Variables Place the following variables: Age College Choice Gender GPA Grade Level Phone Number Race Weight Categorical (Qualitative) Quantitative Distributions Distribution: Example: To Examine and Describe Data: • Examine each variable by itself first; then examine the relationship between variables • Graph the data; then add numerical summaries of the data Displaying Distributions Type of Variable Graphical Displays Numerical Summaries Categorical Pie Charts Bar Graphs Counts Percents Proportions Quantitative Dot Plots Stem Plots (Stem & Leaf) Box Plots (Box & Whisker) Histograms Center (mean, median, mode) Spread (range, standard deviation) m&m Activity – Dot Plot 1. I will give each student ~25 m&ms. If you get more, cover your eyes and randomly remove candy until you have exactly 25 pieces. 2. Calculate the percentage of ORANGE pieces. 3. Come up to the back board and place a dot for your percentage. Describing Distributions **** Remember your SOCS!!! ***** Shape Outliers Center Spread Stemplot Worksheet The following lists the running time (in minutes) of videotape versions of 22 movies directed by Alfred Hitchcock. Construct a stemplot and describe the distribution. Film The Birds Dial M for Murder Family Plot Foreign Correspondent Frenzy I Confess The Man Who Knew Too Much Marnie North by Northwest Time 119 105 120 120 116 108 120 130 136 Film Psycho Rear Window Rebecca Vertigo Shadow of a Doubt Spellbound Topaz Under Capricorn The Paradine Case Time 108 113 132 128 108 111 126 117 116 Homework Read Textbook pages 1-12 Do exercises p. 7/#2, 4, 6, 7, 8 And p. 22/#11, 13 Check answers to odd problems Bring a leaf next class. Review policies and procedures sheet with your parents and get it signed! Lesson Objectives At the end of the lesson, students can: • Describe the distribution of a variable • Determine types of variables • Display variables graphically • Describe the overall pattern of a distribution