A Random Sample Is Selected from a Normally Distributed Population

question 208

Multiple Choice

A random sample is selected from a normally distributed population. The following sample statistics are obtained: n = 20, = 30, and s = 10. Based on this information, and using a 95% confidence level, which of the following statements is true?

• A) The critical value is 1.7921.
• B) The standard deviation of the sampling distribution ofis .50.
• C) The margin of error is approximately4.68.
• D) The critical value is 1.96.
• E) The margin of error is approximately3.24.

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Definitions:

Stereotypes

Schemas that allow for easy, fast processing of information about people, events, or objects, based on their membership in particular groups.

Abstract Mental Concept

The ability to understand ideas that are not tied to concrete physical objects or experiences.

Symbolic

Relating to or denoting symbols or symbolism, which are used to represent ideas or qualities.

Analogical Representation

A concept in cognitive psychology where mental representations are understood to have similarities with the physical objects they represent, allowing for inference and understanding based on these analogies.