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Two teams of workers assemble automobile engines at a manufacturing plant in Michigan. Quality control personnel inspect a random sample of the teams assemblies and judge each assembly to be acceptable or unacceptable. A random sample of 127 assemblies from team 1 shows 12 unacceptable assemblies. A similar random sample of 98 assemblies from team 2 shows 5 unacceptable assemblies. (15 pts)
Construct a 90% confidence interval for the difference between the portions of unacceptable assemblies generated by the two teams.
Based on a review of the confidence interval found in part a, is there sufficient evidence to conclude, at the 10% significance level, that the two teams differ with respect to their portions of unacceptable assemblies. Conduct a hypothesis test to prove this theorem
For which values of the differences between these two sample portions could you conclude that a statistically significant difference exists? (at a = .10 level)
A PN junction has Na=10^19 cm^-3 and Nd= 10^16 cm^-3. a) with V=0 what are the minority carrier densities at the depletion region edges Assume V= 0.6 V for (b)-(d). b) What are the minority carrier densities at the depletion region edges
Traffic lights are being converted from incandescent bulbs to LED arrays to save operating and maintenance costs. Typically each incandescent light uses three 100-W bulbs, one for each color R,Y,G,A competing LED array consists of 61 LEDs.
An electric field E = 10z(hat) V/m exists in air (for which epsilon_r = 1) in the region defined by the equation z > 0. A dielectric medium with epsilon_r = 5 exists in the region defined by the equation z
Where (in the sequence of subsystems within a communication system) does the line encoder used? Draw a block diagram. Write a sentence or two on what is in the other boxes. What are the two broad parameters associated with an efficient line encoder..
A one-dimensional infinite potential well with a width of 12 Ao contains an electron. (a) Calculate the first two energy levels that the electron may occupy. (b) If an electron drops from the second energy level to the first, what is the wavelengt..
A uniform magnetic field is applied perpendicular to the plane of a 60-turn circular coil with a radius of 6.0 cm and a resistance of 0.60 ohms. If the magnetic field increases uniformly from 0.20 T to 1.8 T in 0.20 s
Impulse Responses of LTI systems can be physically found by inputting \(x[n] = \delta[n]\)to the system and measuring the output. Assume that during the process, we inadvertently input\(x[n] = \delta[n] + \delta[n-1]\)
A waveform generator is connected to an op-amp which has been setup as a voltage follower. The voltage follower is then loaded with a 50 Ohm resistor. What output impedance setting should the waveform generator use
Three two-input "AND" gates have their outputs connected to an "OR" gate. The first "AND" gate has each of its inputs at logic HIGH level. The second "AND" gate has each of it's inputs at logic LOW level.
Digitizing an Audio Signal, PAM, ADC, An audio signal has a bandwidth that extends from 100 Hz to 10 kHz. The signal is sampled to create a PAM signal and then digitized by an analog to digital converter (ADC) that has 8 bits.
Using nodal analysis solve for the current and supemode used to solve this circuit is located between which two nodes?
You are working with a design team on a new product and are assigned to design the power supply. The requirements for the power supply are as follows: Input AC: 115 V AC +- 10%, 50-60 Hz Outputs: +5 V DC at 100 ma, +-12 V DC
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