The Random Variable X Is the Number of Houses Sold

question 30

Multiple Choice

The random variable x is the number of houses sold by a realtor in a single month at the Sendsom's Real Estate Office.Its probability distribution is as follows.Find the standard deviation of the number of houses sold.

• A)6.86
• B)2.62
• C)1.62
• D)2.25
• E)4.45

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Definitions:

Polyploids

Organisms or cells having more than two paired sets of chromosomes, often resulting in increased size or other changes.

Hybridization

(1) Interbreeding between members of two different taxa. (2) Interbreeding between genetically dissimilar parents. (3) In molecular biology, complementary base pairing between nucleic acid (DNA or RNA) strands from different sources.

Plant Evolution

The study of the processes that led to the diversity of the plant kingdom, from the earliest forms of life to the vast array of plants we see today.

Mechanical Isolation

A prezygotic reproductive isolating mechanism in which fusion of the gametes of two species is prevented by morphological or anatomical differences.