A Random Sample of 144 Observations Has a Mean of 20

question 13

Multiple Choice

A random sample of 144 observations has a mean of 20, a median of 21, and a mode of 22. The population standard deviation is known to equal 4.8. The 95.44% confidence interval for the population mean is

• A)15.2 to 24.8
• B)19.200 to 20.800
• C)19.216 to 20.784
• D)21.2 to 22.8

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Definitions:

Psychological Problems

Conditions affecting an individual's mental state, potentially disrupting their emotional, psychological, and social well-being.

Diathesis-stress Model

The diathesis-stress model is a psychological theory that explains behavior as a result of a predispositional vulnerability together with stress from life experiences.

Genetic Factors

Hereditary aspects and contributions to an individual's traits, behaviors, and predispositions, passed from parents to offspring through genes.

Schizophrenia

A chronic mental disorder characterized by delusions, hallucinations, disorganized speech, and impaired cognitive ability.