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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.
Assume you were in charge of advertising for an automotive dealership when the gas prices increased to $6 per gallon. Most of your cars are fuel-efficient, but you have two models that have extremely poor fuel economy
suppose we have a set of blood pressures with a mean of 70 diastolic and a sample standard deviation of 10 points. if
Can you use the usual algorithms for addition and subtraction without treating zero as a number? Explain.
Is P(K + 1) = P(K)(365-K)/365 and, If so, why? Find the smallest class size K for which the probability that two or more students have the same birthday exceeds 0.5.
Use the Histogram option in Data Analysis to check the assumption of normality. Does the data appear to be normally distributed? Comment.
What is the 90% confidence interval estimate of the difference between two population means.
The following memorandum opinion on statistical significance was issued by the judge in a trial involving many scientific issues. The opinion has been stripped of some legal jargon and has been taken out of context.
If there are 81 fraternity members, how much should they buy so that using the normal approximation they are 93.32% sure they will not run out?
consider the formula used for any confidence interval and the elements included in that formula. what happens to the
The scores on a standardized mathematics test for 8th-grade children in New York State form a normal distribution with a mean of m = 70 and a standard deviation of s = 10. What proportion of the students in the state have scores less than X = 75?
Bill is doing a project for you in the marketing department. In conducting his analysis regarding consumer behavior and a new product that has come out
Tweleve cases of leukemia are reported in people living in a particular census tract over a 5 year period. Is this number of cases abnormal if only 6.7 cases would be expected based on national cancer incidence rates?
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