An field researcher is gathering data on the trunk diameters of mature pine and spruce trees in a certain area. the following are the results of his random sampling. can he conclude, at a = 0.10, that the average trunk diameter of a pine tree is greater than the average diameter of a spruce tree? pine trees spruce treessample size 40 60mean trunk diameter, cm 51 47population variance 105 167a) the data does not support the conclusion that the average pine tree trunks are larger because the test value 0.74 is less than than the critical value1.28.b) the data supports the conclusion that the average pine tree trunks are larger because the test value 1.72 is greater than than the critical value 1.28.c) the data supports the conclusion that the average pine tree trunks are larger because the test value 1.72 is greater than than the critical value 1.65.d) the data does not support the conclusion that the average pine tree trunks are larger because the test value 27.21 is greater than than the critical value 1.65.