The accompanying data is on cube compressive strength [MPa) of concrete specimens. 112.1 97.0 92.6 86.0 102.0 99.4 95.8 103.5 89.0 36.6 l USE SA (a) Is it plausible that the compressive strength for this type of concrete is normally dist'ibuted? O The normal probability plot is not acceptably linear, suggesting that a normal population distribution is not plausible. The normal probability plot is acceptably linear, suggesting that a normal population distribution is plausible. O The normal probability plot is not acceptablyr linear, suggesting that a normal population distribution is plausible. O The normal probability plot is acceptably linear, suggesting that a normal population distribution is not plausible. V (b) Suppose the concrete will be used for a particular application unless there is strong evidence that true average strength is less than 100 MPa. Should the concrete be used? Carry out a test of appropriate hypotheses. State the appropriate hypotheses. O HO: p = 100 Hauxtll) O H0: :1 100 Hang: 100 O HO: p = 100 Ha: p > 100 :3 H0: p = 100 Ha: I;