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A A head librarian supervises a number of libraries in a large county. He wants to know if full-time library workers and part-time library workers

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A A head librarian supervises a number of libraries in a large county. He wants to know if full-time library workers and part-time library workers re-shelve books at the same rate. So, he checks the records of 42 full-time library workers and finds that they re-shelve an average of 113 books per hour with a standard deviation of 8.1 books per hour. The records of 42 part-time library show that they re-shelve an average of 110 books per hour with a standard deviation of 10.1 books per hour. Using a level of significance of a=.05, is there enough evidence to indicate a difference in the mean number of books re-shelved by full-time workers compared to part-time workers? Answer the following questions: 1. Multiple choice: Which equation would you use to solve this

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