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Unformatted text preview: range=12-1=11 mean=6.71 stdev=sqrt(121-6.71^2)=sqrt(76)=8.71 8. Find the z-score of an exam of 76 if the mean of the entire class was 82 and the std. deviation was 4. z=(82-76)/4=3/2=1.5 9. What is the probability that a student in the class of problem #8 above scored less than 76? p=0.067 10. Tom scored a 56 on a quiz where the average was 44 and the std. deviation was 12; his brother Tim scored 63 in a different class where the average was 52 and the std. deviation was 10. Who scored relatively higher? zT=(56-44)/12=1 zT=(63-52)10=1.1 Tim scored relatively higher...
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This note was uploaded on 12/30/2010 for the course DSA 12 taught by Professor Jhonecaine during the Winter '10 term at Aberystwyth University.
- Winter '10