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For each of the scenarios below, select:
A : variable is binomial (approximately)
B : variable is Poisson (approximately)
C : variable is neither
If you select C, explain why you rejected both binomial and Poisson models?
(a) The number of errored bits in a packet of 1024 bits.
(b) Time between packets arriving at a router.
(c) Student has reaction time to 100 stimuli tested. Count as ”success” = reacting within 0.1 second. Count the number of successes.
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- Mensa requies a test score to be in the top 2%. The test has a mean of 100 and Std. Dev. of 15.and scores are normally distributed. If 4 subjects take the test and they have a mean of 132 but the individual scores are lost, can we conclude that all 4 of them are eligible for Mensa?Researchers investigate how the presence of cell phones influence the quality of human interaction. Subjects are randomly selected from a population and divided into an experimental group that is asked to leave their phones in the front of the room and a control group that are not asked to leave their cell phones at the front of the room. Subjects are left alone for 10 minutes and then asked to take a survey designed to measure quality of interactions they had with others in the experiment. What statistical test is appropriate?Describe a study in which you can use both nonparametric and parametric statistics. A researcher has participants expecting to receive either painful or mild electrical shocks during a study wait in a quarter-full waiting room with other participants. He then measures whether they choose to sit next to other participants or if they sit far away on their own. What is the best test to run for this study and why?
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