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Estimating Age

Estimating Age Presented by J. Wilson Write your guess of the age of the following people in the table on your Age Estimation data sheet. Tiger Woods Oprah Winfrey Joe Torre John Mayer Condoleeza Rice Michelle Wie Johnny Depp Dakota Fanning Jodi Rell Jennifer Hudson

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Estimating Age

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  1. Estimating Age Presented by J. Wilson

  2. Write your guess of the age of the following people in the table on your Age Estimation data sheet.

  3. Tiger Woods

  4. Oprah Winfrey

  5. Joe Torre

  6. John Mayer

  7. Condoleeza Rice

  8. Michelle Wie

  9. Johnny Depp

  10. Dakota Fanning

  11. Jodi Rell

  12. Jennifer Hudson

  13. Nelson Mandella

  14. Will Ferrell

  15. George W. Bush

  16. How well did you estimate? Enter the actual age of each of these personalities in column 2 of your table.

  17. 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

  18. 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

  19. 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

  20. 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?

  21. 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?

  22. 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

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