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The Nyquist plot of a conditionally stable system is shown in Figure P9.4 for a specific gain K. (a) Determine whether the system is stable, and find the number of roots (if any) in the right-hand s-plane. The system has no poles of Gc(s)G(s) in the right half-plane, (b) Determine whether the system is stable if the - 1 point lies at the dot on the axis.
A sample of 25 concession stand purchases at the October 22 matinee of Bride of Chucky showed a mean purchase of $5.29 with a standard deviation of $2.78.
the number of people arriving for treatment at an emergency room can be modeled by a poisson process with a rate
let xy be uniformly distibuted on the triangle generated by the points 00 10 and 01. more formally the joing pdf is
A teacher wants to know if students in her biology class did significantly better on an exam after instruction using authentic learning. The scores pre and post test are listed below. Based on an α = .05, what can the teacher conclude?
a. What sample size would you recommend if an insurance agency wanted the sample mean to estimate the population mean within $25? b. What is the probability that the sample mean is within $100 of the population mean?
Tests on a certain battery have determined that the mean (average) time until failure is 40 hours. Assume that the time T until failure of the battery is exponentially distributed. What is the probability that the battery will fail within 40 hours
suppose that a financial analyst wants to evaluate the variability of the prices of a new stock in the market. the
How much money would she have to start with, in order for her to have a 95% chance of winning 10 dollars before going broke?
How are the mean, median, and mode interrelated? What considerations lead to the choice of one of these measures of location over another?
A researcher reports a mean pulse rate of 80 for the ampled patients. the data also revealed a standard deviation of 10.5. what percent of patients pulse rates will fall between 69.5 ans 90.5?
Estimate the probability that a randomly selected jar will have a fill, x, that is out of specification. Assume that the process is in control and that the population of all jar fills is normally distributed.
According to Fortune, solar power now accounts for only 1% of total energy produced.15 If this number was obtained based on a random sample of 8,000 electricity users, give a 95% con?dence interval for the proportion of users of solar energy.
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