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I am taking a survey and trying to find out information about the students I teach. I ask the following two questions: 1. How many classes are you taking this summer? 2. How long do you expect to take on your first exam? After looking at data on question 2, I determine that there is a 60% chance that a student will finish the exam in less than an hour. Assuming this value is true, and I take a random sample of 20 students, what is the probability that at least 9 but no more than 12 of the students finish the exam in less than an hour? APPENDIX B Tables 877 TABLE II (continued) g. n = 15 .01 .05 .10 20 30 50 .60 .70 .80 SHI 95 99 .860 463 .206 035 .005 1000 4000 .000 .000 .990 829 .549 .167 .035 .005 1000 4000 .000 000 .000 .000 .000 1.000 964 .816 398 .127 027 004 1000 .000 .000 .000 .000 .000 1.000 995 .944 .648 .297 .091 018 002 .000 .000 000 .000 .000 1.000 .999 987 .838 515 .217 059 009 .001 .000 .000 .000 .000 1.000 1.000 998 .939 .722 .403 .151 034 .004 .000 .000 .000 .000 1.000 1.000 1.000 982 .869 .610 304 .095 015 .001 000 .000 .000 1.000 1.000 1.000 996 .950 .787 .500 213 .050 .004 000 .000 000 1.000 1.000 1.000 .999 .985 .905 696 390 .131 .018 000 .000 .000 1.000 1.000 1.000 1.000 .996 .966 .849 597 .278 .061 .002 .000 .000 1.000 1.000 1.000 1.000 .999 .991 .941 .783 485 .164 .013 .001 000 1.000 1.000 1.000 1.000 1.000 998 982 909 .703 .352 .056 .005 000 1.000 1.000 1.000 1.000 1.000 1.000 996 973 .873 .602 .184 .036 000 13 1.000 1.000 1.000 1.000 1.000 1.000 1.000 995 .965 .833 .451 .171 010 14 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 995 965 .794 .537 .140 h. m = 20 .01 05 .10 20 50 70 .90 95 99 .818 358 .122 012 .000 .000 .000 000 .983 .736 .392 .069 .001 000 000 000 .999 925 677 206 035 004 OOO .000 .000 000 000 1.000 984 867 411 107 016 001 000 .000 000 .000 000 000 AUAWNE 1.000 .997 957 630 .238 .051 1006 000 .000 .000 .000 000 1.000 1.000 989 804 416 .126 021 002 000 000 000 000 000 1.000 1.000 998 913 .608 250 058 006 000 000 000 .000 .0001.000 1.000 .998 .913 .608 .250 .058 1006 .000 .000 .000 .000 1.000 1.000 1.000 .968 .772 416 .132 021 .001 .000 .000 .000 .000 1.000 1.000 1.000 .990 887 .596 .252 .057 .005 .000 4000 .000 .000 1.000 1.000 1.000 .997 .952 .755 412 .128 .017 .001 .000 .000 .000 10 1.000 1.000 1.000 999 .983 .872 588 .245 .048 .003 .000 .000 .000 11 1.000 1.000 1.000 1.000 .995 .943 .748 404 .113 .010 .000 .000 .000 12 1.000 1.000 1.000 1.000 .999 .979 .868 584 .228 .032 .000 .000 .000 13 1.000 1.000 1.000 1.000 1.000 .994 .942 .750 .392 .087 .002 .000 .000 14 1.000 1.000 1.000 1.000 1.000 .998 .979 .874 .584 .196 .011 .000 .000 15 1.000 1.000 1.000 1.000 1.000 1.000 .994 .949 .762 .370 .043 .003 .000 16 1.000 1.000 1.000 1.000 1.000 1.000 .999 .984 .893 589 .133 .016 .000 17 1.000 1.000 1.000 1.000 1.000 1.000 1.000 .996 .965 .794 .323 .075 .001 18 1.000 1.000 1.000 1.000 1.000 1.000 1.000 .999 .992 .931 .608 .264 .017 19 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 .999 .988 .878 .642 .182 (continued) O .527 O .622 O .456 O .693
