Solve and explain step by step

eww weer it * * (G0.5/1 pt 54.5 32 petaits Score on last try: 0.5 of 1 pts, See Details for m All submitted parts correct. Jump to last submitted part. Next question @ Geta similar question You can retry this question below * Several archeology students are un prepared for a surprise true/false test with 20 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.) = [10 ij y] o Find the standard deviation for the number of correct answers for such students. (Round answer to two decimal places.) o= a h 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 12 correct answers? no, it would not be unusual yes, it would be unusual Submit