The data In the accompanying table represent the compressrve strength, in thousands of pounds per square inch (psr), of 20 samples of concrete taken two and seven days alter pouring. Complete parts (a) through (c) below. a Click the icon to View the data table. a. At the 0.05 level of signicance. Is there evrdence that the mean strength Is lower at two days than at seven days? Let [.11 be the mean strength at two days and let 112 be the mean strength at seven days. State the null and alternative hypotheses Choose the correct answer below. A. H0410 50 (where on :p1 \"2) 35. Ho: "'3 2 0 (where [40 : '11 p2) H1ZpD>D H1:pD0 (where \"D :p1* p2) H1IpDPE0 H1IpDSO E. H0: I'D