For testing the difference between two population proportions, the pooled proportion estimate is found by taking:
a. the proportion of successes from sample 1 plus the proportion of successes from sample 2.
b. the total number of successes in both samples divided by the total of both sample sizes.
c. the difference between the proportion of successes in each sample.
d. None of these choices.
Question 2
Which of the following will be reflected by deseasonalized time series?
a. Trend effects
b. Cyclical effects
c. Random variation
d. All of these choices are true.
Continuous variation in a natural population
The bobcat population has seen declines in the American Midwest, but is generally stable and healthy
Difference between Asian (left) and African (right) elephant ears.
Predators and Population Cycles
World population density
After elections were held, it was desired to estimate the proportion of voters who regretted ...