An Examination Consisting of Ten True-Or-False Questions Was Taken by a Class

question 220

Multiple Choice

An examination consisting of ten true-or-false questions was taken by a class of 100 students. The probability distribution of the random variable X, where X denotes the number of questions answered correctly by a randomly chosen student, is represented by the accompanying histogram. The rectangle with base centered on the number 8 is missing. What should be the height of this rectangle? ​ ​

• A) 0.15
• B) 0.3
• C) 0.25
• D) 0.1

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Definitions:

Priming

A psychological phenomenon whereby exposure to one stimulus influences the response to another stimulus, often without conscious guidance.

Spreading Activation

A theory in cognitive science explaining how information is retrieved in the human mind, suggesting that ideas in memory are connected and accessing one idea triggers the retrieval of related ideas.

Von Restorff Effect

A psychological phenomenon that occurs when an item that stands out from a group is more likely to be remembered than others.

Spreading Activation

A mechanism in neural networks where the activation of one node leads to the subsequent activation of related nodes, facilitating information retrieval.