Compute the Mean and Standard Deviation of a Binomial Random

question 52

Multiple Choice

Compute the Mean and Standard Deviation of a Binomial Random Variable
-A quiz consists of 20 multiple choice questions, each with five possible answers, only one of which is correct. Find the mean and the standard deviation of the number of correct answers.

• A) mean: 4; standard deviation: 1.78885438
• B) mean: 4; standard deviation: 2
• C) mean: 10; standard deviation: 1.78885438
• D) mean: 10; standard deviation: 3.16227766

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Definitions:

Achieved Statuses

Social positions that are acquired through an individual's own efforts, talents, or choices, as opposed to ascribed statuses, which are inherited.

Ascribed Statuses

Refers to the social status a person is assigned at birth or assumes involuntarily later in life, based on factors like race, family heritage, and gender.

Role Conflict

Two or more roles associated with contradictory expectations.

Role Strain

Conflicting expectations within the same role.