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• <br />0 <br />0 <br />20 <br />16 <br />m 12 <br />A <br />D <br />A <br />d <br />D <br />E <br />Z 8 <br />4 <br />0 <br />0 3000 6000 9000 12000 15000 18000 21000 24000 <br />Uniaxial compressive strength, psi <br />Figure 4a. I listogram frequency diagram for uniaxial compressive strength, all tests. <br />40 <br />30 <br />m <br />m <br />9 <br />O <br />0 20 <br />E <br />z <br />z <br />10 <br />All holes <br />Average=2,000,000 psi <br />Standard deviation=1,800,000 psi <br />_ Young's modulus <br />0 1 2 3 4 5 6 7 8 9 10 11 12 <br />Young's modulus, mpsi <br />Figure 4b. I listogram frequency diagram for Young's modulus, all tests. <br />Maleki Technologies, Inc. <br />Page 14 <br />All holes <br />Average=8,528 psi <br />Standard deviation=4,770 psi <br />- Unaxial compressive strength