$0.25 ANS
- This tutorial was purchased 2 times and rated A+ by students like you.
- Posted on Apr 29, 2008 at 10:43:45PM
A:
Preview: ... ly selected from across the country are interviewed in order to determine the popularity of the U.S. <br>president. The sample in this case is the 1200 people, and the population is all the people in the country. <br>In the example the proportion of people in the sample who approve of the president is an example of point estimate.<br>Suppose that out of 1200 people in the sample, 615 approve of the president. The point estimate of the proportion of the people in the country who approve of the president is 615/1200 = 0. 5125.<br>2Ten 1-milliliter containers taken from different locations of a swimming pool and tested for the density of Escherichia coli bacteria. The sample is the 10 containers of water, and the population is all the water in the swimming pool.<br>Suppose that in the example of the 10 containers of sampled water, the sample average of the 10 observed E. coli bacteria densities is 1500/cm2 . The point estimate of the density of E. coli bacteria in the swimming pool is 1500/cm2 .<br>3It was desired to find the population mean and standard deviation of the ages of the students enrolled at a particular community college. It was impossible to survey all the students, so a random sample of ...
The full tutorial is about 1011 words long .
