Explanation Given: The mean of the distribution is 72 and the standard deviation is 16 . Concept used: The probability associated with the distribution x = a is shown below. P ( X > a ) = P ( Z > a − μ σ ) … … ( 1 ) Calculation: Consider X as the score on an examination and x as the lowest score to obtain a grade A. A grade A is assigned to 10 % of the class, so x satisfies the below equation. P ( X ≥ x ) = 10 100 = 0.10 Substitute 0.10 for P ( X ≥ a ) , x for a , 72 for μ and 4 for σ in equation (1) as follows: 0

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Author: Tan

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Chapter 10.3, Problem 32E

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To find: The lowest score to obtain an A grade.

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Chapter 10.3, Problem 31E

Chapter 10.3, Problem 33E

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Chapter 10 Solutions

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Ch. 10.1 - Define the following terms in your own words: a....Ch. 10.1 - Prob. 2CQ Ch. 10.1 - Prob. 3CQ Ch. 10.1 - Prob. 1E Ch. 10.1 - Prob. 2E Ch. 10.1 - Prob. 3E Ch. 10.1 - Prob. 4E Ch. 10.1 - Prob. 5E Ch. 10.1 - Prob. 6E Ch. 10.1 - Prob. 7E

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The lowest score to obtain an A grade.

Solution Summary: The author calculates the probability associated with the distribution x=a.

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Chapter 10 Solutions