Estimating Age

•Enter the name of each person in the Enter the name of each person in the “name” column of the table on your “name” column of the table on your worksheet.worksheet.

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

Tiger Woods

Hillary Clinton

Tom Cruise

Daniel Radliffe

John McCain

Maya Angelou

Condoleezza Rice

Ringo Starr

Nelson Mandella

Oprah Winfrey

Barack Obama

Bono

Shaquille O’Neal

Julia Roberts

Serena Williams

George W. Bush

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

Actual Ages

Nelson Mandella -- 90 -- July 18, 1918Nelson Mandella -- 90 -- July 18, 1918 Oprah Winfrey -- 54-- January 24, 1954Oprah Winfrey -- 54-- January 24, 1954 Barack Obama – 46 – August 4, 1961Barack Obama – 46 – August 4, 1961 Bono -- 48 – May 10, 1960Bono -- 48 – May 10, 1960 Shaquille O’Neal -- 36 -- March 6, 1972Shaquille O’Neal -- 36 -- March 6, 1972

Julia Roberts – 40 -- October 28, 1967Julia Roberts – 40 -- October 28, 1967 Serena Williams -- 26 -- September 26, 1981Serena Williams -- 26 -- September 26, 1981 George W. Bush -- 62 -- July 6, 1946George W. Bush -- 62 -- July 6, 1946

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 Use a ruler to draw the “best fit” line through your data.your data.

•Find the equation of the “perfect-guess” line- Find the equation of the “perfect-guess” line- WITHOUT using your calculator!!!WITHOUT using your calculator!!!

How well did you estimate?

•Using your data, create a scatter plot on your Using your data, create a scatter plot on your graphing calculator. Choose a viewing window graphing calculator. Choose a viewing window and sketch the graph on your worksheet.and sketch the graph on your worksheet.

•Justify your viewing window choice on your Justify your viewing window choice on your worksheet.worksheet.

•Using your calculator, graph your “perfect guess” Using your calculator, graph your “perfect guess” line over the scatter plot (using Y=).line over the scatter plot (using Y=).

How well did you estimate?

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