In constructing a confidence interval estimate for the difference between the means of two populations, where the unknown population variances are assumed not to be equal, summary statistics computed from two independent samples are as follows: 
, 
, 
, 
, 
, and 
. Construct a 90% confidence interval for 
.
Definitions:
Social
Pertains to activities, behaviors, or phenomena related to the interactions and relationships among individuals within a society.
William James
An American philosopher and psychologist, often referred to as the "Father of American psychology."
Clothing
Items worn on the body to protect, adorn, or for cultural reasons, including garments and accessories.
Self
Refers to an individual's unique sense of identity and personal experience as a conscious being.
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