A Simple Random Sample of 144 Items Resulted in a Sample

question 137

Short Answer

A simple random sample of 144 items resulted in a sample mean of 1257.85 and a standard deviation of 480. Develop a 95% confidence interval for the population mean.

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Definitions:

Personalities Develop

The process by which individual characteristics, traits, and patterns of behavior form and evolve over time.

Gradual Changes

Slow and incremental alterations or developments that occur over time.

Period Of Years

A span of time that consists of multiple years, often used to describe durations in historical, developmental, or future contexts.

Fake Good

The act of presenting oneself in an overly positive manner, often to appear more favorable in psychological evaluations or social situations.