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03-30-2008, 06:43 AM
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| A biology teacher noted the scores on a strd exam from past classeswitha... ...mean of 74, and std dev of 14.? The teacher decides to use a new book. She believed it would increase the mean, but the std dev would remian at 14. Using the new book the class, a class of 50 students scored a mean of 76 on the std exam. question? find the probib that a class of 50 using the new book will have a samplemean as large or larger than76, if the new book were equal to the old book(u=74) and (o=14 for all the students using the new book.??? Question// Do you think that there is evidence to support the teachers claim that the new book is superior?      |
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