Use the Following Data for the Next Questions

question 5

Essay

Use the following data for the next questions. Scientists, researching large
woody debris (LWD), surveyed the number of LWD pieces from aerial photos
taken annually for the past 35 years at two different sites. Over the 35 years of
photos examined, the first site had a mean number of LWD pieces per hectare per
year (LWD/ha/yr) of 3.7 pieces with a standard deviation of 1.9. The second site
had a mean number of LWD/ha/yr of 4.3 with a standard deviation of 2.4. Assume
a .05 significance level for testing the claim that the mean LWD/ha at the first site
had less than the mean LWD/ha/yr at the second site. Also, assume the two
samples are independent simple random samples selected from normally
distributed populations.
-Use a .05 significance level and the traditional or P-value method for hypothesis testing the claim that over time, the LWD abundance at the first site has a standard deviation different from that at the second site. State a conclusion about the null hypothesis and a final conclusion that addresses the original claim.