Using a normal distribution concept and by allocating the calculated mean and st

Question

Using a normal distribution concept and by allocating the calculated mean and standard deviation as stated above, determine the number of magazines where more than 75% of readers has a college degree? HELP

Data Item Circulation Male% Female% Home Delivery % Avg Age Annual Income College Graduates % Better Homes & Garden 7615 22 78 63 42 23907 37 Business Week 875 69 31 38 41 30979 69 Car & Driver 1208 88 12 43 31 26476 47 Cosmopolitan 3015 18 82 56 28 23856 46 Ebony 1280 42 58 63 34 16980 30 Entertainment 1771 69 31 61 31 24249 44 Family Circle 4093 15 85 73 43 22584 35 Field and Stream 1254 82 18 50 35 25052 30 Forbes 931 73 27 41 43 37165 77 Fortune 857 71 29 30 40 35330 74 Glamour 2327 6 94 50 27 22507 44 Golf Digest 1661 81 19 62 44 33555 56 Good Housekeeping 4348 14 86 65 40 23012 37 Harpers Bazaar 673 8 92 36 35 25794 57 Hot Rod 871 79 21 49 28 23290 24 House & Garden 1356 20 80 47 41 24366 40 House Beautiful 813 15 85 45 41 24370 44 Ladies Home Journal 3225 10 90 64 39 22000 38 Mademoiselle 1236 9 91 49 29 23828 52 McCalls 3439 12 88 63 40 21060 32 Statistics Mean 2142.4 Median 1318 Mode None Population variance 2837613.54 Population standard deviation 1684.521754 Sample variance 2986961.621 Sample standard deviation 1728.282853 Minimum 673 Maximum 7615 Range 6942 First Quartile 5th & 6th position; 903 Third Quartile 15th & 16th position: 3120 Coefficient of Variation 0.806704095 81%

Using a normal distribution concept and by allocating the calculated mean and standard deviation as stated above, determine the number of magazines where more than 75% of readers has a college degree? HELP

Explanation / Answer

only one person has the college degree of more than 75%

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