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.

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 n Tiger Woods December 30, 1975 n Hillary Clinton October 26, 1947 n Tom Cruise July 3, 1962 n Daniel Radcliffe – July 23, 1989 n John McCain – August 29, 1936 n Maya Angelou April 4, 1928 n Condoleezza Rice – November 14, 1954 n Ringo Starr July 7, 1940

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

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=).

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.