An Initial Time Study Resulted in an Average Observed Time

question 15

Essay

An initial time study resulted in an average observed time of 2.2 minutes per cycle, and a standard deviation of .3 minutes per cycle. The performance rating was 1.20. What sample size, including the 20 observations in the initial study, would be necessary to have a confidence of 95.44 percent that the observed time was within 4 percent of the true value?

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Definitions:

Socioemotional Development

The evolution of an individual's capacity to experience, express, and manage emotions and to establish meaningful social relationships.

Erikson's Theory

A theory of psychosocial development identifying eight stages through which a healthily developing human should pass from infancy to late adulthood.

Adolescence

A transitional stage of physical and psychological development that generally occurs during the period from puberty to legal adulthood.

Emerging Adulthood

A phase of the life span between adolescence and full-fledged adulthood which encompasses late teens through the twenties, marked by exploration and self-discovery.