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A position control system for a DC motor is shown in Figure AP7.8. Obtain the root locus for the velocity feedback constant K, and select K so that all the roots of the characteristic equation are real (two are equal and real). Estimate the step response of the system for the K selected. Compare the estimate with the actual response.
Marketing firm asked the random set of married and single men as to how much they were eager to spend for vacation. At alpha= .05, is a difference in two amounts?
The Texas Transportation institute at texas A&M university conducted a survey to determine the number of hours per year drivers wasted sitting in traffic. the table below shows the number of hours wasted per year sitting in traffic.
Is there evidence that the population mean is above $300, if X (bar) = $305.11 and s = $43.20?
the mean annual cost of automobile insurance is 939 cnbc 2232006 with a standard deviation of 245.what is the
a certain brand of phone is supposed to weight 25 grams. we assume that the phone weight follow a normal distribution
Because its fixtures are attached to the ceiling, the bulbs are rather cumbersome to replace, and Shop-Mart is looking into the possibility of switching to Phipps bulbs, which cost the same. A sample of Phipps bulbs lasted an average of 2080 hours..
If six classes are to be formed, choose an appropriate lower class limit for the first class and a class width. Construct a frequency distribution. Construct a relative frequency distribution
A roulette wheel has 38 slots, numbered 0, 00, and 1 to 36. The slots 0 and 00 are colored green, 18 of the others are red, and 18 are black.
Find the critical t alpha/2 assuming the population is normally distributed, the confidence level is 95%, n=101 and sigma is unknown.
you are evaluating two portfolios for your personal investment on the basis of their return.portfolio as yearly return
Forty percent of the readings are within 0.5 V of the true value. Estimate the standard deviation for the meter. What is the probability of an error of 0.75 V?
Perform the check regarding the sample size that confirms the sampling distribution of the possible values for will be approximately normally distributed.
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