At Any Given Time, How Many Extratropical Cyclones Might One

question 63

Multiple Choice

At any given time, how many extratropical cyclones might one expect to be in existence in the Northern Hemisphere?

• A) 6 to 15
• B) 50 to 100
• C) 100 to 1000
• D) 1 or 2
• E) 25 to 50

---

Definitions:

Sample

Subset or portion of a population.

Mean

The average value of a data set, obtained by dividing the sum of all the values by the number of values.

Confidence Interval

A span of numerical values, calculated from statistics of a sample, that is expected to encompass the value of a not yet known population parameter with a certain degree of confidence.

Sample

A subset of individuals or observations selected from a larger population for the purpose of statistical analysis.