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The average number of vacation days per year offered by different US companies is skewed to the right. A random sample of 60 companies showed the mean number of vacation days was 22, and the standard deviation was 9 days.
1- Why is it OK to use these data for inference even though the population is skewed?
2- Find a 95% confidence interval for the mean number of vacation days offered by US companies.
In a digital audio system, a digital to analog converter reproduces the analog voltage levels represented by the digital samples. This signal is inherently jagged with sharp transitions between each sample.
Design a Miller integrator with a time constant of 0.1 s and an input resistance of 100 k ohm. A dc voltage of -1 volt is applied at the input at time 0, at which moment vO = -10 V. How long does it take the output to reach 0 V to +10 V
The measurement of a current is repeated five times. The measured values are: 0.62, 6.21. 6.23, 6.18 and 6.24 mA. a. What type or types of errors might be involved: mistakes, systematic errors, random errors
Finding rms current through Capacitor and Inductor, A circuit consists of a sine wave signal generator and a reactive component (L or C). The output of the generator is a sine wave with a peak amplitude of 8.8 volts at a frequency of 10.0 kHz.
Consider the thermal noise produced by a resistor. How does the noise level change if the resistance is increased by a factor of 100 Next, assume the noise is passed through an ideal, noiseless low-pass filter.
A radio channel has a bandwidth of 10 KHz and a SNR of 15 dB. What is the maximum data rate that can be transmitted: (a) Using any system (b) Using a code with 64 possible states
The voltage on bus 1 is 1.0 per unit (pu) at 30 degrees; the voltage on bus 2 is 0.95 per unit at 5 degrees. The reactance connecting bus 1 to bus 2 is 0.5 per unit Ohms, and the resistance is negligible. a)How much real power (pu) is flowing from ..
A causal LTI system has the difference equation y[n]+0.25y[n-1]-0.125y[n-2] = x[n]+x[n-1]. What is the impulse response of this system and what is it's output y[n] for input signal x[n] = (-1)^n u[n].
Prepare an Excel graph showing the individual components and summated resultant waveform of the odd harmonic series resulting in an approximate square wave.
A three-phase transmission line having a reactance of 120 ohms per phase is connected to a wye-connected load whose resistance is 160 ohms per phase. If the supply volatge is 70kV line-to-line, calculate a) The line-to-neutral voltage per phase.
Let y(t) he the signal at the output of the LTI system when x(t) is the input signal. The following signals are sampled using a train of impulses with periodicity T, signal x(t) is sampled to obtain xc(t), and signal y(t) is sampled to obtain yc(t..
Clearcly, any noise will pass straight through to the ADC subsystem, introducing measurement error. You have two choices to mitigate this: SW filtering and HW filtering. Assume the uC sample rate, Fs, is 100 Hz with 8 bit resolution.
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