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... dard deviation of the number of students called on is two decimal places as needed.)

... dard deviation of the number of students called on is two decimal places as needed.)

College Algebra
College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 50E: Flexible Work Hours In a recent survey, people were asked whether they would prefer to work flexible...
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K A teacher uses a program that randomly chooses a student in the class to "volunteer" to answer a question. The teacher will stop choosing students once a student gets the right answer, but if the teacher is given four wrong answers in a row, he will stop and help the class himself. He estimates that 88% of the students in the class know the correct answer. A probability model for the number of students called on, whose expected value is 1.14, is shown below. Find the standard deviation of the number of students called on. Number of students Probability 1 0.88 2 0.1056 C 3 0.012672 4 0.001728 The standard deviation of the number of students called on is student(s). (Round to two decimal places as needed.)
Transcribed Image Text:K A teacher uses a program that randomly chooses a student in the class to "volunteer" to answer a question. The teacher will stop choosing students once a student gets the right answer, but if the teacher is given four wrong answers in a row, he will stop and help the class himself. He estimates that 88% of the students in the class know the correct answer. A probability model for the number of students called on, whose expected value is 1.14, is shown below. Find the standard deviation of the number of students called on. Number of students Probability 1 0.88 2 0.1056 C 3 0.012672 4 0.001728 The standard deviation of the number of students called on is student(s). (Round to two decimal places as needed.)
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