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.

---

Definitions:

Appendicular

Pertaining to limbs or appendages of the body, particularly the bones of the limbs and the structures associated with them.

Pelvis

The lower part of the torso in human and many animals, consisting of the hip bones surrounding the pelvic cavity.

Pectoral Girdle

The skeletal structure that provides support for the upper limbs, including the clavicles and scapulae.

Clavicles

Clavicles, commonly known as collarbones, are paired bones that sit horizontally at the top of the chest, providing support and stability to the shoulders.