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In an instrumentation system, there is a need to take the difference between two signals, one of v1 = 2sin(2π × 60t) + 0.01 sin(2π × 1000t) volts and another of v2 = 2sin(2π ×60t)-0.01 sin(2π ×1000t) volts. Draw a circuit that finds the required difference using two op amps and mainly 100-kΩ resistors. Since it is desirable to amplify the 1000-Hz component in the process, arrange to provide an overall gain of 100 as well. The op amps available are ideal except that their output voltage swing is limited to ±10 V.
suppose that 75 of adult americans agree that while downloading music from the internet and then selling it is piracy
Assume the probability that a person has the desease is 0.03 for all people, independently of each other, and compute the expected number of tests necessary for each group.
The estimated age-adjusted percent of persons 18 years of age and over who smoke cigarettes are shown below for females and males for selected years.
What is the probability that a particular arrival time measurement will be in error by less than 0.01 microsecond? What does your answer mean?
Suppose you compute a simple linear regression on a single sample. Then you find additional data and recompute the regression on the larger sample and that the result is an increase in the regression slope.
Heights of men on a baseball team have a bell-shaped distribution with a mean of 177cm and a standard deviation of 5cm. Using the empirical rule, what is the approximate percentage of the men between the following values?
black bears ursus americanus have a tendency to wander for food and they have a high level of curiosity. these
For a sample of 138 independent observations from a normal distribution of unknown μ and variance σ 2 = 2.6, the sample mean is 52.3. What is the width of the 95% confidence interval for μ?
That only 94 percent of the booked passengers actually show up for the flight. Find the probability that if the airline books 16 persons, not enough seats will be available.
A clothing manufacturer tests an SRS of 3 specimens of each fabric. (a) What is the probability that the mean breaking strength of the 3 untreated specimens exceeds 49 pounds.
question a large company is concerned about turnover so it commissions a survey that will be given to a random group of
1.students often incorrectly believe that inference for a population proportion based on the sample proportion is
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