A Field Researcher Is Gathering Data on the Trunk Diameters ${ } ^ { \pm } = .10$

Multiple Choice

A 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 ${ } ^ { \pm } = .10$ , that the average trunk diameter of a pine tree is greater than the average diameter of a spruce tree?
$\begin{array}{|l|c|c|}\hline & \text { Pine trees } & \text { Spruce trees } \\\hline \text { Sample size } & 80 & 60 \\\hline \text { Mean trunk diameter }(\mathrm{cm}) & 35 & 33 \\\hline \text { Sample variance } & 130 & 150 \\\hline\end{array}$

A) The data do not support the claim because the test value 0.48 is less than 1.28.
B) The data do not support the claim because the test value 0.98 is less than 1.28.
C) The data do not support the claim because the test value 0.98 is less than 1.64.
D) The data do not support the claim because the test value 0.48 is less than 1.64.