A Multiple-Choice Test Has 45 Questions and 5 Choices for Each

question 40

Multiple Choice

A multiple-choice test has 45 questions and 5 choices for each question. If a student is totally unprepared and guesses on each question, how many questions can she expect to answer correctly, and what is the standard deviation of the number of correct answers? Round any estimated quantities to two decimal places. ​

• A) ​
• B) ​
• C) ​
• D) ​
• E) ​

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Definitions:

Stimulus Discrimination

The process by which individuals or organisms learn to respond differently to various stimuli that are not identical.

Selective Retention

The process by which individuals remember only information that is consistent with their beliefs or attitudes, ignoring contradictory information.

Selective Comprehension

The process by which consumers interpret information in a way that aligns with their existing beliefs and attitudes, often leading to distorted perceptions.

Selective Exposure

The process by which individuals preferentially seek out and pay attention to information that conforms to their existing beliefs and values, while avoiding contradictory information.