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Give the range for the usual number of correct answers

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Several archeology students are unprepared for a surprise true/false test with 25 questions, and all of their answers are guesses.

Find the mean for the number of correct answers for such students.

(Round answer to one decimal place.)

μ =

μ=

Find the standard deviation for the number of correct answers for such students. (Round answer to two decimal places.)

σ =

σ=

Give the range for the usual number of correct answers.

(Enter answer as an interval using square-brackets only with whole numbers.) usual values =

Would it be unusual for a student to pass by guessing and getting at least 15 correct answers?

  • yes, it would be unusual
  • no, it would not be unusual

Reference no: EM132488388

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