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

question 106

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:

Physiological Arousal

The body's acute response to stimuli or stress, involving increased physiological activity like heart rate, blood pressure, and energy levels.

Emotional Experience

The complex, subjective state involving thoughts, feelings, and physiological changes that respond to external or internal events.

James-Lange Theory

A theory suggesting that emotions are the result of physiological responses to external events, where our emotional experience arises from our recognition of bodily reactions.

Cannon-Bard Theory

A theory of emotion that posits emotions and physiological responses occur simultaneously, not sequentially.