a sample that is similar to the population on all characteristics. Two-stage random sampling A process in which clusters are first randomly selected and then individuals are selected from each cluster. Stratified random sampling The process of selecting a sample in such a way that identified subgroups in the population are represented in the sample in the same proportion as they exist in the population. Random sampling Methods designed to select a representative sample by using chance selection
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SIDS31081 - Statistics Refresher 2006 – 2007 Exercises (Probability and Random Variables) Exercise 1 Suppose that we have a sample space with five equally likely experimental outcomes : E1‚E2‚E3‚E4‚E5. Let A = {E1‚E2} B = {E3‚E4} C = {E2‚E3‚E5} a. Find P(A)‚ P(B)‚ P(C). b. Find P(A U B) . Are A and B mutually exclusive? c. Find Ac‚ Bc‚ P(Ac)‚ P(Bc). d. Find A U Bc and P(A U Bc) e. Find P(B U C) Exercise 2 A committee with two members is to be selected from a collection of 30
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the selection of an unbiased or random subset of individual observations within a population of individuals intended to yield some knowledge about the population of concern‚ especially for making predictions based on the statistical inference (Ader‚ Mellenberg & Hand: 2008). There are quite a number of sampling methods that can be employed in research and these include simple random sampling‚ systematic sampling‚ stratified sampling‚ cluster sampling‚ matched random sampling‚ quota sampling‚ convenience
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The Hurt Locker is a film that tells the story of an Army bomb squad fighting to stay alive in Iraq. The Sand Storm is a play by Sean Huze in which a series of monologues about the Iraq war are performed by a group of Marines. Both of these follow a series of characters through the war and shows it affects them not only as a soldier in the war but as a civilian back home. To compare and contrast these I would look at the base similarities and differences first‚ and then move on to a more analytical
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Alika Vaiese Soc 105 M.Ross 5/6/10 Random Family It tells the story of three young people in the Bronx‚ starting with the mid-80s drug explosion to welfare reform in the late 90s. Jessica was the girlfriend of a notorious‚ 20 year old drug kingpin prior to his life sentence and her 10 year sentence for conspiracy. Jessica’s brother‚ Cesar‚ tightly-wound and loyal‚ was imprisoned as a teenager. Coco‚ generous and bubbly‚ started dating Cesar when she was 14. By the time she was 20‚ she
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Discrete Random Variables: Homework Exercise 1 Complete the PDF and answer the questions. |X |P(X = x) |X(P(X = x) | |0 |0.3 | | |1 |0.2 | | |2 | | | |3 |0.4 | | a. Find the probability that X = 2. b. Find the expected value. Exercise 2 Suppose that you are offered the following “deal.” You roll a die. If you
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you saunter into the locker room you‚ get a stench of old and yucky sweat‚ but also a little whiff of victory. There are posters of all the teams that have gone undefeated‚ and I wanted to be on a fresh and new poster that pronounced “2016-2017 Warriors seven wins and zero losses”. With our team picture in the middle‚ but to get that I had to be confident in myself and learn from my mistakes. I have been playing football ever since I was little. When you wander into the locker room you see that there
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During one of my Online Facebook sessions‚ I was watching a video on random acts of kindness called “Validation”‚ it reminded me that performing random acts of kindness like simply complimenting people is something that I need to incorporate more into my life on a regular basis. I actually had a warm feeling inside knowing that many people have done so many kind things to me. I too have done many kind things to others; but‚ I had still not decided to incorporate this small thing into my life. I immediately
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has been interpreted to: require that searches and seizures be reasonable; and prohibit warrants except those issued upon probable cause. However‚ as with any rule‚ there are exceptions. The exceptions to the warrant requirement will be discussed below. In interpreting the Fourth Amendment‚ the courts have balanced the individual’s right with what is good for the rest of society. Fourth Amendment rights are therefore not absolute. Seizures and Searches
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in which two or more computers or devices transfer data‚ instructions‚ and information via cables and wires or wirelessly MERITS: 1.Computer is now essential in office‚ institutions‚ bank‚ rail‚ shops‚ business‚ industry etc. we are helpless without it. 2. Computer has made our life easier. It helps us to do much hard work quickly that we can’t do manually and save our time. 3. Computer is the heart of science and technology. Scientists do their research in every subject and even send spacecraft
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