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Title: Star Library: Breaking the Code -- A Graphical Exploration Using Bar Charts
Url: https://www.causeweb.org/cause/archive/repository/StarLibrary/activiti...
Creator: Gabrosek, John
Schuckers, Michael E.
Publisher: Grand Valley State University
West Virginia University
Description: The Caesar Shift is a translation of the alphabet; for example, a five-letter shift would code the letter a as f, b as g, ... z as e. We describe a five-step process for decoding an encrypted message. First, groups of size 4 construct a frequency table of the letters in two lines of a coded message. Second, students construct a bar chart for a reference message of the frequency of letters in the English language. Third, students create a bar chart of the coded message. Fourth, students visually compare the bar chart of the reference message (step 2) to the bar chart of the coded message (step 3). Based on this comparison, students hypothesize a shift. Fifth, students apply the shift to the coded message. After decoding the message, students are asked a series of questions that assess their ability to see patterns. The questions are geared for higher levels of cognitive reasoning.
LC Classification: Science -- Mathematics -- Mathematical statistics -- Addresses, essays, lectures
Science -- Mathematics -- Mathematical statistics -- Graphic methods
Science -- Mathematics -- Probabilities -- Addresses, essays, lectures
Social sciences -- Statistics -- Theory and method of social science statistics -- Hypothesis testing
GEM Subject: Mathematics -- Statistics
Mathematics -- Probability
Key Concept: Mathematics -- Graphs
Mathematics -- Hypothesis testing
Mathematics -- Probability
Mathematics -- Statistics
Date Issued: 2001
Resource Type: Reference Material
Instructional Material
Instructional Material -- Lesson/Lesson Plan
Instructional Material -- Instructor Guide/Manual
Format: Document -- HTML
Audience: Educator
Learner
Education Level: High School
Higher Education
Higher Education -- Undergraduate (Lower Division)
Higher Education -- Undergraduate (Upper Division)
Higher Education -- Technical Education (Upper Division)
Higher Education -- Technical Education (Lower Division)
Vocational/Professional Development Education
Language: English
Rights: John Gabrosek and Michael E. Schuckers
Access Rights: Free access
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Source: CAUSEweb
Full Record Views: 2
Resource URL Clicks: 3
Cumulative Rating: NOT YET RATED
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