Number of Fish Tanks The following data give the number of fish tanks owned for a population of 4 families. 
{Number of Fish Tanks Narrative} Find the sampling distribution of 
, and use it to calculate the mean and the standard deviation of 
.
Definitions:
Carl Rogers
An influential American psychologist who founded client-centered therapy and contributed significantly to humanistic psychology.
Henry Murray
An American psychologist who developed a theory of personality based on needs and motivations, co-developing the Thematic Apperception Test (TAT).
Source Traits
Stable and permanent traits that are the basic factors of personality, derived by the method of factor analysis.
Surface Traits
Traits that show a correlation but do not constitute a factor because they are not determined by a single source.
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