Astronomers Are Interested in the Recessional Velocity of Galaxies -

question 19

Essay

Astronomers are interested in the recessional velocity of galaxies - that is, the speed at which they are moving away from the Milky Way. The accompanying table contains the recessional velocities for a sample of galaxies, measured in km/sec. Negative velocity indicates the galaxy is moving towards us. ​
(a) Calculate these numerical summaries:
The mean _______________
The standard deviation _______________
The median _______________
The interquartile range _______________
(b) Construct a skeletal box plot for these data.
(c) Judging from the data and your responses in parts (a) and (b), would you say this distribution is skewed or approximately symmetric? Justify your response using appropriate statistical terminology.

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Definitions:

Plains Indians

Refers to the Native American tribes who lived on the vast grasslands of the Great Plains in North America, known for their horse culture and buffalo hunts.

Trade Networks

An extensive system of trading routes and partnerships that facilitate the exchange of goods, services, and information between different regions or countries.

John Astor

John Jacob Astor was an American businessman, real estate builder, investor, and at one time the wealthiest person in the United States, known for amassing his fortune in fur trade and by investing in New York City real estate.

Jay's Treaty

An agreement in 1794 between the United States and Great Britain that sought to resolve issues remaining after the American Revolution and facilitate ten years of peaceful trade between the two countries.