Estimating Age

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Estimating Age
Presented by J. Wilson
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• Write your guess of the age of the following
  people
• in the table on your
• Age Estimation data sheet.

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Tiger Woods
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Oprah Winfrey
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Joe Torre
6
John Mayer
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Condoleeza Rice
8
Michelle Wie
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Johnny Depp
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Dakota Fanning
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Jodi Rell
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Jennifer Hudson
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Nelson Mandella
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Will Ferrell
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George W. Bush
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How well did you estimate?

• Enter the actual age of each of these
  personalities in column 2 of your table.

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Actual Ages

• Tiger Woods 31 December 30, 1975
• Oprah Winfrey 53 January 24, 1954
• Joe Torre 66 July 18, 1940
• John Mayer 29 October 16, 1977
• Condoleeza Rice 52 November 14, 1954
• Michelle Wie 17 October 11, 1989
• Johnny Depp - 43 - June 3, 1963

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Actual Ages

• Dakota Fanning 13 February 23, 1994
• Jodi Rell 60 June 16, 1946
• Jennifer Hudson 25 September 12, 1981
• Nelson Mandela 88 July 18, 1918
• Will Ferrell 39 July 16, 1967
• George Bush 60 July 6, 1946

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Entering the data in your calculator

• Enter your guesses in L1 and the actual ages in
  L2
• Directions for keystrokes for TI-83
• Determine your dependent and independent
  variables before you graph
• Set an appropriate WINDOW
• Graph

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Analyzing the data

• If you were a 100 accurate age guesser, what
  would be the relationship between the x- and
  y-coordinates of each point?

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(No Transcript)
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• For the line y x, what does
• it mean when a point is
• above the line?

• For the line y x, what
• does it mean when a point is
• below the line?

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KEYSTROKES FOR TI-83 GRAPHING CALCULATOR Enter
your guesses in a list in your TI-83 Plus Press
STAT Choose 1 Edit In L1, type your guesses in
the order of the names above. Enter the actual
ages into L2. Enter the actual ages in the order
of the names above. Set up a scatter plot to
compare your guesses to the actual ages. Press
2nd Y ( STAT PLOT ) Press ENTER to begin
setting up Plot 1. Press ENTER to turn the plot
ON. Press ENTER to select the Type of plot.
Press to select X List. Press 2ND 2 (L2)
to make L2 the X List. Press 2ND
1 (L1) to make L1 the Y List. Set an
appropriate window for your data. Press GRAPH to
view the scatter plot. Return to Entering Data
in your Calculator