MAT_1143-feb_14 - Click to edit Master subtitle style...

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Unformatted text preview: Click to edit Master subtitle style February 14, 2011 Sections 2.4 & 2.9 Reminder Exam 1 will be on Friday, February 18 It will cover material from 1.1 through 2.9 Slant on Data As we see data presented, we need to consider some questions? What is the bias of the person with the argument? Are they telling me everything? Are they only showing me things that support their argument? Examples My miles from home data a few days ago. I could claim the average student lives 1072 miles from SBU I could even say the average distance is 1072 A more accurate claim is the median-85 miles Even that is skewed if I dont say we are only looking at 10 selected students Graphs can be Manipulated Truncating the years Changing scale Narrowing-widening Shorter-Taller Graphs Different impressions can be given to the reader by doing this Lets look at some examples Truncate Scales O bj1 4 O bj1 5 O bj1 6 Which graph shows most rapid change? Truncate Scales O bj1 7 O bj1 8 O bj1 9 Which graph shows increasing function? Truncate Scales...
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MAT_1143-feb_14 - Click to edit Master subtitle style...

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