(1) Here is a sample of ten grades on a statistics exam: 60 , 63 , 68 , 74 , 77, 78, 78, 83, 88, 91 Find: (a) range (b) mean (c) median (d) mode (e) standard deviation (2) Given the grouped data: Class # Class frequency 1 7 - 15 10 2 16 - 24 8 Find: (a) grouped mean (x.) (b) percent error of x, (if x = 12) (c) modal class (d) estimate for standard deviation 3) Given the following contingency table: A B C GPA over 3.5 GPA 2.5 - 3.5 GPA under 2.5 Totals Male 185 240 95 520 Female 125 275 80 480 Totals 310 515 175 1000 Find: (a) Pr(Male) (b) Pr(Male and GPA over 3.5) (c) Pr(Male or GPA over 3.5) (d) Pr(Female | GPA under 2.5) = Pr(Female given GPA under 2.5) e) Pr(GPA under 2.5 | Female) (f) Pr(Male | GPA 3.5 or less) (in other words, 2.5 - 3.5 or under 2.5) (g) Pr(Female | Male)