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A quiz consists of 20 multiple choice questions, each with five ...

violin13

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A quiz consists of 20 multiple choice questions, each with five ...

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A quiz consists of 20 multiple choice questions, each with five possible answers, only one of which is correct. If a student guesses on each question, what is the mean and standard deviation of the number of correct answers?

▸ mean: 4; standard deviation: 2

▸ mean: 4; standard deviation: 1.78885438

▸ mean: 10; standard deviation: 3.16227766

▸ mean: 10; standard deviation: 1.78885438

Textbook

Statistics: Informed Decisions Using Data

Edition: 5^th

Author: Sullivan

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javiermorilla

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More solutions for this book are available here

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violin13 Author

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Thanks

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Brilliant ツ

jayfo05

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I appreciate what you did here, answered it right Smiling Face with Open Mouth

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