Given the following information,calculate the degrees of freedom that should be used in the pooled-standard deviation t-test. 
Definitions:
Erikson's Stages
A theory by Erik Erikson that describes eight stages of psychosocial development from infancy to late adulthood, each involving specific conflicts that need resolution.
Generativity Versus Stagnation
A stage in Erik Erikson's theory of psychosocial development where adults need to create or nurture things that will outlast them, contributing to the next generation, as opposed to stagnation, which is failing to find ways to contribute.
Old-Old Stage
A term often used in gerontology to refer to individuals who are aged 85 years and older, emphasizing the later stages of life and associated health considerations.
Assisted Living
A residential option for older adults who require assistance with activities of daily living but do not need the full level of care provided by a nursing home.
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