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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:
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