advertisement

Guideline for Exam Points for Questions File: Math Stuff/Exam Grade Points September 2013 Problem type Isolated Connected Multiple Choice, nowork or mental math problems Hypothesis test results and conclusions Work Required Problems 3 + answers Additional Deductions/ Calculator only Point Allocation Examples 2 Pts for Multiple Choice, no-work, calculator only with no evidence possible or mental math problems such as Circle 1: yes no, Mean and SD, Decision rule lines and α,β, power labels, Family __________, evaluate functions, square roots, or exponents. 3 CPts 1 for correct if input was provided 2 for consistent with reasonable input Follow up questions to hypothesis test conclusion (3 Cpts): 0 points if p-value evidence from prior problem does not exist 1 point for accurate Significant? 1 for consistent with significance Which Hypothesis? 1 point for consistent with p-value, 0 points if p-value>1 Conclusion? Elementary Hypothesis Test conclusions (6 pts): There is is not a 2 points each part significant Regular Hypothesis Test Conclusions (12 or 14 WCpts): difference (t= ________ 6 wpts for test statistic p = _____, n=________) 3 cpts for p-value 1 point for correct, 2 points for consistent with test statistic 3 cpts for significance if p-value is provided – 1 point for correct, 2 points for consistent with a p-value<1 2 points for sample size 6-8 wpts Confidence Intervals – 2 2 Points for each single answer (1 pt if ≥0.5 correct) answers, either Work Points boundaries or Stat ± ME 4 points for A level work. Organized, all steps, Error-free or lists calculator inputs. Includes Formula-substitution-solution(s) Simplify expressions 3 points for B level work. Organized with errors or semi-organized, missing steps, but error-free. Dimensional Analysis 2 points for C level work. Evidence of correct strategy with correct answer or incomplete set of answers (abs equations) 1 point for D level work. Evidence of correct strategy with incorrect answer or lists calculator inputs with substitution errors. 0 point for F level work. No work, incomprehensible work or wrong strategy (no matter how well it is organized). 4 pts if all correct Label Normal Curve 2 pts if ≥0.5 correct Binompdf 1 pt if answer is provided and something is correct Interval Notation Incomplete simplification -1 per missed step Form / Notation errors Rounding w/consequences Extra answers Two non-equivalent answers of which one is correct instead of s x and s nearly correct but with apparent input error -1 Guidelines for Exam Points for Graphs Line Graph for inequalities Location of each point and arrow (3) Cartesian Graphs (8) (A) 3 points – 1 each for point location, symbol and direction of arrow If these aren’t correct but are precise (consistent with input), give 2 points. Location of line (border to border) 8 points – 2 for accuracy (correct) 2 for Shape of Line 2 for precision (consistent with input) 2 for Table of values -1 if not border to border Histogram Title X axis Title Y axis Title X axis scale Y axis scale Frequency Distribution Enough Reader Friendly Classes or followed directions about the starting value and class width, [L,H) notation Counts Accurate Bar height Precise Bar height Bars Not Touching (13) 1 1 1 1 1 2 Box Plot Title X axis Title (if needed) Y axis Title Y axis scale Pie Chart Title All Slice Labels provided All Slice Values provided All Slice Percents provided Size of slices – approximately correct Values and Percents (11) 1 2 2 2 Scatter Plot Title X axis Title Y axis Title X axis scale (9) 1 1 1 1 1 Accurate 1 Precise 2 Accurate Y axis scale 1 Plot Line 2 2 2 if all correct 1 if correct ≥ 0.5 0 if correct < 0.5 If the graph is accurate, and no table of values is shown, give credit for precision and ToV. (10) 1 1 1 1 Input Values Accurate placement Precise placement 2 if all correct 1 if correct ≥ 0.5 0 if correct < 0.5 -1