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PSYC B5: Elementary Statistics for the Behavioral & Social Sciences Dr. Ginger M. LeBlanc Today’s Special Introduction Enrollment Syllabus How to not only survive, but to do well – – – – Math phobia Textbook Study groups Active Learning What is Statistics? Procedures used to – – – – Organize Summarize Conclude Communicate Who are You? Researcher Helping Profession Office Assistant Teacher Parent Shopper Patient Statistics Math Codes / Symbols “statistical notation” Book is no fun Open Mind! Don’t be a Blockhead! Mathematical Operations X or Y stand for each individual score obtained in a study. – – – – Addition X + Y. Subtraction X – Y. Division X / Y. Multiplication XY, (X)Y, or X(Y). X2 “X squared” or “X times X. X “the square root of X.” Rounding 2 decimal places If the number in the next decimal place is 5 or greater than 5, round up If the number in the next decimal place is less than 5, round down Transformations Mathematical procedure for systematically converting a set of scores into a different set of scores. Proportions Is a decimal number between 0 and 1 that indicates a fraction of the total To transform a number to a proportion, divide the number by the total Percents A percent (or percentage) is a proportion multiplied by 100 To transform a percent back into a proportion, divide the percent by 100 Creating Graphs The horizontal line across the bottom of a graph is the X axis The vertical line at the left-hand side is the Y axis Plot of Height and Weight Scores Next Class Read & take notes on Chap. 1 & 2 Bring Calculator – Practice problems in chapter 1 & application questions on page 13 Quiz