An electrical load _______
A) Has electrical resistance
B) May be unwanted resistance caused by corrosion
C) May be an electrical device
D) All of these
D
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Find v(t) for t > 0 in the circuit in Fig. 16.68.
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The process of depositing connective weld beads parallel to one another is known as _____
a. padding b. stringing c. pooling d. weaving
Which of the following can generally be performed by drivers?
A. routine servicing B. scheduled preventive maintenance C. unscheduled maintenance and repair D. all of the above
Each of 16 students measured the circumference of a tennis ball by four different methods, which were:
Method A: Estimate the circumference by eye. Method B: Measure the diameter with a ruler, and then compute the circumference. Method C: Measure the circumference with a ruler and string. Method D: Measure the circumference by rolling the ball along a ruler. The results (in cm) are as follows, in increasing order for each method: Method A: 18.0, 18.0, 18.0, 20.0, 22.0, 22.0, 22.5, 23.0, 24.0, 24.0, 25.0, 25.0, 25.0, 25.0, 26.0, 26.4. Method B: 18.8, 18.9, 18.9, 19.6, 20.1, 20.4, 20.4, 20.4, 20.4, 20.5, 21.2, 22.0, 22.0, 22.0, 22.0, 23.6. Method C: 20.2, 20.5, 20.5, 20.7, 20.8, 20.9, 21.0, 21.0, 21.0, 21.0, 21.0, 21.5, 21.5, 21.5, 21.5, 21.6. Method D: 20.0, 20.0, 20.0, 20.0, 20.2, 20.5, 20.5, 20.7, 20.7, 20.7, 21.0, 21.1, 21.5, 21.6, 22.1, 22.3. a. Compute the mean measurement for each method. b. Compute the median measurement for each method. c. Compute the 20% trimmed mean measurement for each method. d. Compute the first and third quartiles for each method. e. Compute the standard deviation of the measurements for each method. f. For which method is the standard deviation the largest? Why should one expect this method to have the largest standard deviation? g. Other things being equal, is it better for a measurement method to have a smaller standard deviation or a larger standard deviation? Or doesn’t it matter? Explain.