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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.
Pretend you are in charge of a packaging equipment company that is filling boxes of cereal. From past experience we know the population's mean weight of the filled boxes is 300 grams (and we know the distribution of grams is approximately normal).
In a completely randomized experimental design, 18 experimental units were used for the first treatment, 10 experimental units were used for the second treatent, and 15 experimental unites were used for the first treatment.
he probability that a pumpkin seed will germinate is 70%. A gardener plants the pumpkins in batches of 12. What is the mean of the distribution? What is the variance of the distribution?
a researcher conducts a hypothesis test to evaluate the effect of a treatment. the hypothesis test produces a z-score
Is sample of 25 papers large adequate to give a good estimate of mean score of all 42,000 students on this exam problem? Explain your answer.
Question 1: A study of 20 college students was conducted to see how many adults would have low bone mineral density, even at a younger age. Investigators wish to know what is the probability of having a bone mineral density score less than 2 units..
1.the weight of medium-sized oranges selected at random from a large bin of oranges at the local supermarket is a
a sports league is making up their season schedule. the league has 12 teams with eight teams from la and the rest from
The use of both test is desired to ensure the reliability of the observations, when the above/below shows if there is a tendency the median, where up/down shows the observation in proportion to each other.
For the 20 test scores shown, find the percentile rank for a score of 86. 75 63 92 74 86 50 77 82 98 65 71 89 75 66 87 59 70 83 91 73. 75th percentile 30th percentile 80th percentile 70th percentile???
for a certain river suppose the drought length y is the number of consecutive time intervals in which the water supply
1.ten years ago a study at a large midwestern university found that 18 of the students at the university were very
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