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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.
The sample information is reported below. At the .10 significance level can we conclude that there is a difference in the amounts quoted?
A sample of 49 repairs showed an average overhaul of 285 hours with a standard deviation of 50 hours. Calculate a 95% confidence interval for the average overhaul.
The areas under a standard normal curve also may be considered to be proba- bilities. Find probabilities associated with the area:- Above Z = 2.33 and Below Z = -2.58
suppose that the mean score on a creativity test is 20 and the standard deviation is 5. you are told that the
Determine the values of the slack and surplus variables and interpret them. Which constraints are binding constraints? Describe.
Compute the indicated confidence interval for the differenciate in proportions. Suppose that the samples are independent and that they have been randomly selected.
Class finds 54% of 450 randomly selected voters are in support. Both groups will create 95% confidence intervals. Which group concludes that the outcome is too close to call? Why?
in the previous exercise suppose that the mean of the filling operation can be adjusted easily but the standard
Find the expected number of passengers who wait for 1 unit of time or less and find P
Write a 700- to 1,050-word paper describing how information systems are changing various aspects of the accounting profession. Include a description of several new technologies and their effects on accounting processes.
The following data represent the daily number of visitors to a small craft shop in Yackandandah. The data were collected over a 16 day period and are ordered numerically (not chronologically).
Assuming that n = 6 for both samples, calculate each of the sample variances, then calculate the pooled variance. Because the samples are the same size, you should find that the pooled variance is exactly halfway between the two sample variances.
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