A Simple Random Sample of Size 20 Has Mean $\bar { x } = 70.89$

question 59

Multiple Choice

A simple random sample of size 20 has mean $\bar { x } = 70.89$ and standard deviation s = 16.77. The population distribution is unknown. Determine the correct method of finding a 90% confidence Interval for the population mean and compute it.

• A) Cannot compute: the population size is too small.
• B) z-method: (64.72, 77.06)
• C) t-method: (64.41, 77.37)
• D) z-method: (64.41, 77.37)

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Definitions:

Stroop Effect

A demonstration of cognitive interference where the brain's reaction time slows down when the color of a word doesn't match the name of the color.

Availability Heuristic

A cognitive shortcut that relies on immediate examples that come to a person's mind when evaluating a specific topic or decision.

Availability Heuristic

A cognitive shortcut based on easily recalled examples when judging a specific area, notion, practice, or decision-making process.

Base-Rate Information

This term relates to how often an event occurs within a general population.