After Landing on an Unexplored Klingon Planet,Spock Tests for the Direction

question 72

Multiple Choice

After landing on an unexplored Klingon planet,Spock tests for the direction of the magnetic field by firing a beam of electrons in various directions and by recording the following observations:
Electrons moving upward feel a magnetic force in the northwest direction.
Electrons moving horizontally toward the north are pushed downward.
Electrons moving horizontally toward the southeast are pushed upward.
Mr.Spock therefore concludes that the magnetic field at this landing site is in which direction?

• A)toward the east
• B)toward the northeast
• C)toward the southwest
• D)toward the southeast
• E)toward the west

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Definitions:

Normal Distribution

Exhibiting symmetry around the mean, this probability distribution reveals that there are more occurrences close to the mean than far away from it.

Chi-squared Distribution

A statistical distribution that is used to describe the distribution of a sum of squared random variables, often used in hypothesis testing.

Degrees of Freedom

The number of independent pieces of information used in the calculation of a statistic, typically the size of the data set minus the number of parameters estimated.

Area

The measurement of the extent of a two-dimensional surface or shape, typically expressed in square units.