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Several psychology students are unprepared for a surprisetrue/false test with 9 questions, and all of their answers are guesses. a. Find the mean and standard

Several psychology students are unprepared for a surprisetrue/false test with 9 questions, and all of their answers are guesses.

a. Find the mean and standard deviation for the number of correct answers for such students.

b. Would it be unusual for a student to pass by guessing(which requires getting at least 6 correctanswers)? Why or whynot?

a. =

(Do notround.)

=

(Round to one decimal place asneeded.)

b. Choose the correct answer below.

A.

No,because6iswithintherangeofusualvalues.

B.

Yes,because6isbelowtheminimumusualvalue.

C.

Yes, because 6 is within the range of usual values.

D.

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