On September 29, 2005, John Roberts was sworn in as the Chief Justice of the United States. Since 1869 there have been nine justices at any one time on the Supreme Court of the United States: one chief justice and eight associate justices. (Prior to that time, the number of justices varied from six to ten.) From the court's inception in 1789 to the present day, 17 men have served as chief justice of the Supreme Court, including Justice Roberts. The previous 16 chief justices are listed in the table below, along with the length of their tenure (in days). This data was retrieved from the Web site of the Supreme Court (www.supremecourtus.gov).

chief justice tenure
John Jay2079
John Rutledge125
Oliver Ellsworth1742
John Marshall12542
Roger B. Taney10425
Salmon P. Chase3065
Morrison R. Waite5133
Melville W. Fuller7938
Edward D. White3804
William Howard Taft3129
Charles E. Hughes4144
Harlan F. Stone1754
Frederick M. Vinson2633
Earl Warren5740
Warren E. Burger6304
William H. Rehnquist  6917


Compute each of the following summary statistics. Round your answers to the nearest day.

median = days

IQR = days

mean = days

standard deviation = days

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