graduate student wants to estimate the number of research
participants he will see in the fall...
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graduate student wants to estimate the number of researchparticipants he will see in the fall semester. Using his data fromthe previous nine semesters, he tabulates a mean of 140 studentsper semester, although departmental records reflect a seasonalvariation (i.e., population standard deviation) of 45 students.Calculate the 99% confidence interval.
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Solution Given that 140 45n 9At 99 confidence
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