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# Estimates percent change in population for each U.S. state over

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The following table gives estimates of the percent change in population for each U.S. state over the years 1990 to 2000. (This data set was used in Example 1.8.)

State Percent Change State Percent Change
Alabama 10.1 Montana 12.9
Arkansas 13.7 New Hampshire 11.4
California 13.8 New Jersey 8.9
Connecticut 3.6 New York 5.5
Delaware 17.6 North Carolina 21.4
Florida 23.5 North Dakota 0.5
Georgia 26.4 Ohio 4.7
Hawaii 9.3 Oklahoma 9.7
Idaho 28.5 Oregon 20.4
Illinois 8.6 Pennsylvania 3.4
Indiana 9.7 Rhode Island 4.5
Iowa 5.4 South Carolina 15.1
Kansas 8.5 South Dakota 8.5
Kentucky 9.7 Tennessee 16.7
Louisiana 5.9 Texas 22.8
Maine 3.8 Utah 29.6
Maryland 10.8 Vermont 8.2
Mass. 5.5 Virginia 14.4
Michigan 6.9 Washington 21.1
Minnesota12.4 West Virginia 0.8
Mississippi10.5 Wisconsin 9.6
Missouri 9.3 Wyoming 8.9

a. Find the five-number summary for this data set and identify which states fall in the lowest quartile and which states fall in the highest quartile.

c. Find the average of the percent change for all the states. Is this the same as the overall percent change for the total U.S.? Explain why or why not.

d. Suppose you include the District of Columbia, which had a percent population change over the time period 1990 to 2000 of -5.7. How does the five-number summary change? Find the new five-number summary and compare it to the five-number summary for the 50 states

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The following table gives estimates of the percent change in population for each U.S. state over the years 1990 to 2000. (This data set was used in Example 1.8.)

State Pct Chg State Pct Chg
Alabama 10.1 Montana 12.9
Arkansas 13.7 New Hampshire 11.4
California 13.8 New Jersey 8.9
Connecticut 3.6 New York 5.5
Delaware 17.6 North Carolina 21.4
Florida 23.5 North Dakota 0.5
Georgia 26.4 Ohio 4.7
Hawaii 9.3 Oklahoma 9.7
Idaho 28.5 Oregon 20.4
Illinois 8.6 Pennsylvania 3.4
Indiana 9.7 Rhode Island 4.5
Iowa 5.4 South Carolina 15.1
Kansas 8.5 South Dakota 8.5
Kentucky 9.7 Tennessee 16.7
Louisiana 5.9 Texas 22.8
Maine 3.8 Utah 29.6
Maryland 10.8 Vermont 8.2
Mass. 5.5 Virginia 14.4
Michigan 6.9 Washington 21.1
Minnesota1 2.4 West Virginia 0.8
Mississippi1 0.5 Wisconsin 9.6
Missouri 9.3 Wyoming 8.9

a. Find the five-number summary for this data set and identify which states fall in the lowest quartile and which states fall in the highest quartile.
From a Texas Instruments TI-84 calculator the 5-number summary for the 50 States data set is:
Minimum ...

#### Solution Summary

The expert estimates the percent change in population for each United States over the years 1990 to 2000.

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