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.

Question

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.

Quizplus · Accepted Answer

The Answer of 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.

Astronomers Are Interested in the Recessional Velocity of Galaxies--That Is