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A chemical plant has an emergency alarm system. When an emergency situation exists, the alarm sounds with probability 0.95. When an emergency situation does not exist, the alarm system sounds with probability 0.02.
A real emergency situation is a rare event, with probability 0.004. Given that the alarm has just sounded, what is the probability that a real emergency situation exists?
Why do researchers want the error variance in their data to be small?- Why do researchers use meta-analysis?
describe an alternative to counterbalancing as a means of controlling confounding variables. give an example to back up
The lengths of Atlantic croaker fishes are normally distributed, with a mean of 9 inches and a standard deviation of 2.56 inches. An Atlantic croaker fish is randomly selected.
Construct a 99% confidence interval for the difference between the true average boot times of the two types of hard drives. Assume the difference will represent (HDD-SSD) and that the population standard deviations are statistically the same.
Design a compensator Gc(s) so that the steady-state tracking error to a ramp input is zero and the settling time (with a 2% criterion) is less than 5 seconds. Obtain the response of the closed-loop system to the input R(s) = 1/s2 and verify that t..
Sun Microsystems has approximately 50% of the high-end Unix machines market with its closest competitor being IBM. Suppose that 15 firms were in the market to purchase a high-end Unix machine. Assume that these firms listened to sales pitches by a..
according to the mendelian theory of inherited characteristics a cross fertilization of related species of
At a certain college, 45% of the students are female, and 17 % of the students major in civil engineering. Furthermore, 12% of the students both are female and major in civil engineering.
Unequal class intervals The small number of observations greater than 7 in Exercise 119 may cause some difficulty in constructing a frequency distribution.
Suppose that once a prize is rejected it is lost, and that our objective is to maximize the probability of obtaining the best prize. Assuming that all n! orderings of the prizes are equally likely, how well can we do?
What is the unbiased estimate of the difference in height between boys and girls? Provide a formula and check the unbiasedness. Calculate the value of this estimate for the given sample.
it is found that when a particular 4-sided die is rolled a 1 occurs 26.9 of the time a 2 occurs 23.8 of the time a 3
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