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It is claimed that the mean IQ of all students in a certain university is 130. It is known that the student population is approximately

It is claimed that the mean IQ of all students in a certain university is 130. It is known that the student population is approximately normally distributed. A random sample of 25 students produced a mean IQ of 134.12 and a standard deviation of 5.5. Test the claim using 5 % level of significance

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