Unformatted text preview: (i) &rst by the rejection rule approach; (ii) then by the P-value approach. Discuss whether females were outnumbered by males among the graduate students in Fall 2007. (c) What is ± , the probability of committing type I error? (d) What is the 95% con&dence interval for & ? Does it contain & = 0 : 5 ? (e) From Facts about Cornell 1 , the true proportion of female graduate/professional students (in Ithaca campus) is 42% in Fall 2007. (i) What is ² , the probability of committing type II error? (ii) What is the power of the test I carried out in part (b)? 1 http://www.cornell.edu/about/facts/stats.cfm 1...
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- Null hypothesis, Type I and type II errors, graduate students