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Estimating Age Enter the name of each person in the “name” column of the table on your worksheet. Enter the name of each person in the “name” column of the table on your worksheet. Enter the estimated age of each person in the “guess” column of the table on your worksheet. Enter the estimated age of each person in the “guess” column of the table on your worksheet.

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Tiger Woods

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Hillary Clinton

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Tom Cruise

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Daniel Radliffe

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John McCain

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Maya Angelou

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Condoleezza Rice

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Ringo Starr

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Nelson Mandella

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Oprah Winfrey

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Barack Obama

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Bono

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Shaquille O’Neal

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Julia Roberts

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Serena Williams

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George W. Bush

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Actual Ages n Tiger Woods -- 32 -- December 30, 1975 n Hillary Clinton -- 60 -- October 26, 1947 n Tom Cruise -- 46 -- July 3, 1962 n Daniel Radcliffe -- 19 – July 23, 1989 n John McCain -- 71 – August 29, 1936 n Maya Angelou -- 80 -- April 4, 1928 n Condoleezza Rice -- 53 – November 14, 1954 n Ringo Starr -- 68 -- July 7, 1940

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Actual Ages n Nelson Mandella -- 90 -- July 18, 1918 n Oprah Winfrey -- 54-- January 24, 1954 n Barack Obama – 46 – August 4, 1961 n Bono -- 48 – May 10, 1960 n Shaquille O’Neal -- 36 -- March 6, 1972 n Julia Roberts – 40 -- October 28, 1967 n Serena Williams -- 26 -- September 26, 1981 n George W. Bush -- 62 -- July 6, 1946

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How well did you estimate? Sketch a graph of the data on graph paper. Sketch a graph of the data on graph paper. Use a ruler to draw the “best fit” line through your data. Use a ruler to draw the “best fit” line through your data. Find the equation of the “perfect-guess” line- WITHOUT using your calculator!!! Find the equation of the “perfect-guess” line- WITHOUT using your calculator!!!

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How well did you estimate? Using your data, create a scatter plot on your graphing calculator. Choose a viewing window and sketch the graph on your worksheet. Using your data, create a scatter plot on your graphing calculator. Choose a viewing window and sketch the graph on your worksheet. Justify your viewing window choice on your worksheet. Justify your viewing window choice on your worksheet. Using your calculator, graph your “perfect guess” line over the scatter plot (using Y=). Using your calculator, graph your “perfect guess” line over the scatter plot (using Y=).

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How well did you estimate? With a partner, discuss whether you are an “over-guesser” or an “under-guesser”? Explain your stance on your worksheet. With a partner, discuss whether you are an “over-guesser” or an “under-guesser”? Explain your stance on your worksheet.

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