Data more closely resemble data from normal distribution

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Kittlitz (1999) presents data on homicides in Waco, Texas, for the years 1980-1989 (data taken from the Waco Tribune-Herald, December 29, 1989). There were 29 homicides in 1989. The table gives the dates of the 1989 homicides and the number of days between each homicide. Date Days between Date Days between 1/20/1989 7/8/1989 2 2/23/1989 34 7/9/1989 1 2/25/1989 2 7/26/1989 17 3/5/1989 8 9/9/1989 45 3/10/1989 5 9/22/1989 13 4/4/1989 25 9/24/1989 2 5/7/1989 33 10/1/1989 7 5/24/1989 17 10/4/1989 3 5/28/1989 4 10/8/1989 4 6/7/1989 10 10/19/1989 11 6/16/1989 9.25 11/2/1989 14 6/16/1989 0.5 11/25/1989 23 6/22/1989 5.25 12/28/1989 33 6/25/1989 3 12/29/1989 1 7/6/1989 11 (a) Plot the days-between-homicides data on a normal probability plot. Does the assumption of a normal distribution seem reasonable for these data? (b) Transform the data using the fourth root of the data of y [days], i.e., 4 y . Plot the transformed data on a normal probability plot. Does this plot indicate that the transformation has been successful in making the new data more closely resemble data from a normal distribution?

Reference no: EM131138244

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