Use the following technology display from a TwoWay ANOVA to answer this question. Biologists studying habitat use in Lepidopteran moths measured the number of savannah moths found at three randomly selected prairie sites with two potential habitat interferences (expansion of row crops and grazing). Use a .05 significance level.
Source 
Df 
SS 
MS 
F 
P 
Site 
2 
.1905 
.0952 
.0381 
.9627 
Habitat 
1 
304.0238 
304.0238 
121.6095 
.0000 
Site*Habitat 
2 
.1905 
.0952 
.0381 
.9627 
What is the value of the F test statistic for the habitat effect? (Points : 0.5)
One method to reduce the effect of extraneous factors is to design the experiment so that it has a convenience sampling design. (Points : 1) 
True
False




Using a .01 significance level, test the claim that the proportions of people who favor/oppose prochoice on the abortion issue are the same for the males and females.


Conclusion: r results in a value close to 1 
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, but do not assume that the population standard deviations are equal.
Find the t test statistic. Give your answer with two decimals, e.g., 9.87 (Points : 0.5)
Medical researchers reviewing the risk of death for elderly patients taking dementia drugs found the following data. Assume a .05 significance level for testing the claim that the proportions are not equal. Also, assume the two simple random samples are independent and that the conditions np ≥ 5 and nq ≥ 5 are satisfied.

Dementia Drugs 
Placebo 
Number of patients 
500 
450 
Total deaths 
23 
12 
Find the z test statistic. Give your answer with two decimals, e.g., 9.87 . (Points : 0.5)
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