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SHOW ALL WORK A statistics instructor has written a new placement . The department chair would...

SHOW ALL WORK

A statistics instructor has written a new placement . The department chair would like to use this new , but is concerned that it may be too long, since students will be given one hour to complete the. The department chair will use the new placement if students take less than a mean time of 55 minutes to complete the . The new is given to a random sample of 22 students whose mean completion time is 52.91 minutes and the standard deviation is 7.1 minutes. At the .01 level of significance, will the department chair use the new placement exam? Complete the following six steps:

Math   Statistics-And-Probability   
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