1. Over the years, the mean IQ of freshmen applicants in a university in a province has been determined to 91. The majority of the applicants from various integrated schools within province. Recently, the school officials have noticed a gradual but noticeable rise in enrolment in the first year college with students coming from various integrated schools in neighboring provinces. The school officials would like to know if the average IQ of their freshmen students might have changed. They took 85 freshmen students and find that the mean IQ is 94 with a standard deviation of 10 at 5% level of significant, has the average IQ of the freshmen students in the university changed?

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