A Random Sample of 20 Observations Taken from a Normally

question 38

Multiple Choice

A random sample of 20 observations taken from a normally distributed population revealed a sample mean of 65 and a sample variance of 16. The lower limit of a 90% confidence interval for the population mean would equal:

• A) 66.546.
• B) 63.454.
• C) 63.812.
• D) 66.188.

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Definitions:

Rationalization

The process of making tasks or workflows more efficient by implementing standardized procedures and methodologies, often associated with the bureaucratization and modernization of organizations.

Independent Variable

In research, a variable that is manipulated or categorized to observe its effect on a dependent variable.

Dependent Variable

In research and experimentation, a dependent variable is the outcome factor that researchers aim to measure and analyze, which is influenced or changed by other variables, known as independent variables.

High Culture

Aspects of culture that are considered the hallmark of sophistication and intellectualism, such as fine arts, classical music, and literature.