Galaxy velocity study. Refer to the Astronomical Journal (July 1995) study of galaxy veloc...

Galaxy velocity study. Refer to the Astronomical Journal (July 1995) study of galaxy velocities, presented in Exercise 2.100 (p. 74). A histogram of the velocities of 103 galaxies located in a particular cluster named A2142 is reproduced below. Comment on whether or not the galaxy velocities are approximately normally distributed.

Source: Oegerle. W. R, Hill. J. M . and Fitchett, M J. “Observations of high dispersion clusters of galaxies: Constraints on cold dark matter,” The Astronomical Journal, Vol. 110, No. 1. July 1995, p 37 (Figure 1).

Exercise 2.100

Examine the sample data in the following table: