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Identify the populations. For each of the following sampling situations, identify the population as exactly as possible. That is, say what kind of individuals the population consists of and say exactly which individuals fall into the population. If the information given is not complete, complete the description of the population in a reasonable way
(a) A college has changed its core curriculum and wants to obtain detailed feedback from students during each of the first 12 weeks of the coming semester. Each week, a random sample of 5 students will be selected to be interviewed.
(b) The American Community Survey (ACS) replaced the census "long form" starting with the 2010 census. The main part of the ACS contacts 250,000 addresses by mail each month, with follow-up by phone and in person if there is no response. Each household answers questions about their housing, economic, and social status.
(c) An opinion poll contacts 1161 adults and asks them, "Which political party do you think has better ideas for leading the country in the twenty-first century?"
1. if a population mean is 300 and the sample mean is 400 the difference of 100 is calleda.standard errorb.sampling
What does the result imply about Mendel's claimed proportion of 3/4?
What is the difference between common causes of variation and special causes of variation?
X, Y, and Z are independent normally distributed random variables. The following information is known about these three variables:
an internet retailer stocks a popular electronic toy at a central warehouse that supplies the eastern united states.
Some families making under $96,000 per year are eligible for health care subsidies. All who are eligible for subsidies are required to purchase insurance. So, some families making under $96,000 per year are required to purchase insurance.
Could Spike claim to the advertiser that it is possible that 25% of men with young children are stay-at-home dads? What is wrong with the reasoning?
This activity used 90% confidence intervals because it is easy computationally to find the bottom 5% and the top 5% of a distribution.
How long would it take to estimate the % of entries having errors using a random sample big enough to get a margin of error less than 2%?
discuss the data that the graph is used to visually represent. speculate on why the editor chose the graph as opposed
Problem: The long run but not the short run. Our intuition about chance behavior is not very accurate. In particular, we tend to expect that the long-run pattern described by probability will show up in the short run as well. For example, we tend ..
Find the probability that a randomly selected student takes neither AP course. (Show work and write the answer in simplest fraction form)
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