1-5 Uses and Misuses of Statistics - navimath · PDF fileStatisticscan’t get any...
Transcript of 1-5 Uses and Misuses of Statistics - navimath · PDF fileStatisticscan’t get any...
Statistics…can’t get any respect?
• Torture numbers, and they'll confess to anything. ~Gregg Easterbrook
4Friday, January 25, 13
Statistics…can’t get any respect?
• Torture numbers, and they'll confess to anything. ~Gregg Easterbrook
• Statistics can be made to prove anything - even the truth. ~Author Unknown
4Friday, January 25, 13
Statistics…can’t get any respect?
• Torture numbers, and they'll confess to anything. ~Gregg Easterbrook
• Statistics can be made to prove anything - even the truth. ~Author Unknown
• He uses statistics as a drunken man uses lampposts - for support rather than for illumination. ~Andrew Lang
4Friday, January 25, 13
Statistics…can’t get any respect?
• Torture numbers, and they'll confess to anything. ~Gregg Easterbrook
• Statistics can be made to prove anything - even the truth. ~Author Unknown
• He uses statistics as a drunken man uses lampposts - for support rather than for illumination. ~Andrew Lang
• There are two kinds of statistics, the kind you look up and the kind you make up. ~Rex Stout, Death of a Doxy
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Claim:
• 80% of all Resumes are Misleading – • Source Xukor, Inc. complied from a
survey of 10,000 applications and resumes combined
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Bluman Chapter 1
1-5 Uses and Misuses of Statistics Suspect Samples
Is the sample large enough?How was the sample selected? Is the sample representative of the
population?
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10Friday, January 25, 13
Bluman Chapter 1
1-5 Uses and Misuses of Statistics Suspect Samples
Is the sample large enough?How was the sample selected? Is the sample representative of the
population? Ambiguous Averages
What particular measure of average was used and why?
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Bluman Chapter 1
1-5 Uses and Misuses of Statistics Changing the Subject
Are different values used to represent the same data?
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11Friday, January 25, 13
Bluman Chapter 1
1-5 Uses and Misuses of Statistics Changing the Subject
Are different values used to represent the same data?
Detached StatisticsOne third fewer calories…….than what?
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11Friday, January 25, 13
Bluman Chapter 1
1-5 Uses and Misuses of Statistics Changing the Subject
Are different values used to represent the same data?
Detached StatisticsOne third fewer calories…….than what?
Implied ConnectionsStudies suggest that some people may
understand what this statement means.
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Bluman Chapter 1
1-5 Uses and Misuses of Statistics Misleading Graphs
Are the scales for the x-axis and y-axis appropriate for the data?
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12Friday, January 25, 13
Bluman Chapter 1
1-5 Uses and Misuses of Statistics Misleading Graphs
Are the scales for the x-axis and y-axis appropriate for the data?
Faulty Survey QuestionsDo you feel that statistics teachers should
be paid higher salaries?Do you favor increasing tuition so that
colleges can pay statistics teachers higher salaries?
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Bluman Chapter 1
Homework
Read Sec 1.5 and know
the important terms.
Do Review Exercises on page
26 #1- 28 all. Due Tuesday Nov 13.
Grace period ends on Thursday Nov 15.
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Extra Credit Opportunity:
If you do any activity to observe Veteran’s Day, let me know and I will give you extra credit.
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