Average diameter of a spruce tree


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 the .10 level of significance, that the average trunk diameter of a pine tree is greater than the average diameter of a spruce tree?

Pine trees Spruce trees
Sample size 40 70
Mean trunk diameter (cm) 45 39
Sample variance 100 150

A. The data does not support the claim because the test value 1.29 is greater than 1.28.

B. The data supports the claim because the test value 2.78 is greater than 1.28.

C. The data supports the claim because the test value 2.78 is greater than 1.64.

D. The data does not support the claim because the test value 1.29 is less than 1.64.

Request for Solution File

Ask an Expert for Answer!!
Basic Statistics: Average diameter of a spruce tree
Reference No:- TGS0119976

Expected delivery within 24 Hours