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Question: Mental health among search and rescue workers. van der Velden, van Loon, Benight, and Eckhardt (2012) investigated whether search and rescue workers called to Haiti following the 2010 earthquake suffered from mental health problems due to their high-stress work. To test this, they recorded the mental health of workers before and after search and rescue work in the region. In their study, the researchers reported a significant decline in mental health for depression, z = -1.977, p = .048, but not for anxiety, z = -0.816, p = .414.
(a) Were participants assigned to the same or different groups in this study?
(b) The researchers did not use a sign test to analyze these data. Thus, the nonparametric test computed in this study must be which test?
MATH1550H: Assignment: Question: A word is selected at random from the following poem of Persian poet and mathematician Omar Khayyam (1048-1131), translated by English poet Edward Fitzgerald (1808-1883). Find the expected value of the length of th..
MATH1550H: Assignment: Question: what is the least number of applicants that should be interviewed so as to have at least 50% chance of finding one such secretary?
MATH1550H: Assignment: Question: Experience shows that X, the number of customers entering a post office during any period of time t, is a random variable the probability mass function of which is of the form
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MATH1550H: Assignment: Questions: Let’s assume the department of Mathematics of Trent University has 11 faculty members. For i = 0; 1; 2; 3; find pi, the probability that i of them were born on Canada Day using the binomial distributions.
Caselet on McDonald’s vs. Burger King - Waiting time
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