State	# letters in name	Year entered the Union	Rank for entering the Union	Area (square miles)
Alabama	77	1819	2222	52,423
Colorado	88	1876	3838	104,100
Hawaii	66	1959	5050	10,932
Iowa	44	1846	2929	56,276
Maryland	88	1788	77	12,407
Missouri	88	1821	2424	69,709
New Jersey	99	1787	33	8,722
Ohio	44	1803	1717	44,828
South Carolina	1313	1788	88	32,008
Utah	44	1896	4545	84,904
Wisconsin	99	1848	3030	65,499

Calculate the least-squares line. Use xx to represent the independent variable. Round any calculated values to twodecimal places.

(e) Find the correlation coefficient. Round your answer to twodecimal places. The correlation coefficient is

(f) Find the estimated number of letters a state would have if it entered the Union in 1900 and 1920. Round your answers to the nearest integer.

(i) The estimated number of letters a state would have if it entered the Union in 1900 is ___

letters.

(ii) The estimated number of letters a state would have if it entered the Union in 1920 is ___

letters.

(h) Use the least-squares line to estimate the number of letters a new state that enters the Union in 2015 would have. Can the least squares line be used to predict it? Why or why not? Round your answer to the nearest integer. The estimated number of letters a state would have if it entered the Union in 2015 is ____letters