The president of a university claims that the mean time spent partying by all students at...

 

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The president of a university claims that the mean time spent partying by all students at this university is at least 7 hours per week. A random sample of 55 students taken from this university showed that they spent an average of 9.50 hours partying the previous week with a population standard deviation of 2.3 hours. Test at the 5% significance level whether the president's claim is true. Explain your conclusion in words. The president of a university claims that the mean time spent partying by all students at this university is at least 7 hours per week. A random sample of 55 students taken from this university showed that they spent an average of 9.50 hours partying the previous week with a population standard deviation of 2.3 hours. Test at the 5% significance level whether the president's claim is true. Explain your conclusion in words.