STATISTICS 6.1. Quality content you can rely on!

STATISTICS 6.1.
Quality content you can rely on!
Random variable - Answer: A random variable is a numerical measure of the outcome
of a probability experiment, so its value is determined by chance. Random variables are
typically denoted using capital letters such as X.


Determine whether the random variable is discrete or continuous. In each case, state
the possible values of the random variable.


(a) The number of hits to a Web site in a day. - Answer: (a) Is the number of hits to a
Web site in a day discrete or continuous?


The random variable is discrete. The possible values are x=0, 1, 2,......


(b) The square footage of a house. - Answer: (b) Is the square footage of a house
Discrete or continuous?


The random variable is continuous. The possible values are a >0


(c) Is the time it takes to fly from City A to City B discrete or continuous? - Answer: The
random variable is continuous. The possible values are t>0.


Is the number of people in a restuarant that has a capacity of 300 discrete or
continuous? - Answer: The random variable is discrete. The possible values are x = 0,
1, 2,...comma 300


Is the time required to download a file from the Internet discrete or continuous? -
Answer: The random variable is continuous. The possible values are t greater than 0.




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