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September 2, 2015

Homework Help: Statistics

Posted by Daniel on Thursday, March 7, 2013 at 10:10am.

A quiz consists of 10 questions. Each question is marked either “right” or “wrong.” For each student in the class, the instructor keeps a record of the number of right answers the student got. In the class, the average number of right answers is 6.2 and the SD of the number of right answers is 1.4.

(1) Find the average number of wrong answers.

(2) Find the SD of the number of wrong answers.

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