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1. A 400-V DC shunt motor has ?eld and armature resistances of respectively 100 and 0.1 Ω. If the motor absorbs 40 kW from the electric grid, calculate:
(a) the line, armature, and ?eld current(b) the electromotive force(c) the ef?ciency
2. The 400-V DC motor of the previous exercise is running at 1100 rpm and absorbing a line current of 80 A. Calculate the torque developed and the ef?ciency.
Describe a business situation where you would want to use a t-test. Why would you choose that test? What would you expect to show by doing this?
Suppose n = 1000 persons are to be sampled from this population and the sample proportion of married persons (ρ-hat) is to be calculated. What is the mean of the sampling distribution of ρ-hat?
The entire batch will be rejected if at least one of those tested is defective. What is the probability that the entire batch wili be rejected?
a computarized airline reservation syetem has a main computer on-line and secondary standby computer. the secondary
suppose that two electronic components in the guidance system for a missile operate independently and that each has a
Identify the level of measurement (nominal, ordinal, interval, ratio) for the number of shares held by stockholders.
State the hypothesis to be tested. Discuss the computed values of R, R-squared and the regression model. State the reject / not reject decision and conclusion.
1. The following are random data from a normal population. The following data represent the rates (micrometers per hour) at which a razor cut made in the skin of anesthetized newts is closed by new cells.
In the bank customer waiting time case, a bank manager had developed a new system to reduce the time customers spend waiting to be served by tellers during peak business hours.
the waiting time for patients at local walk-in health clinic follows a normal distribution with a mean of 15 minutes
A company has 3 goals, listed in order of importance.
Write introduction to STATISTICAL PROCESS CONTROL and Explain the use of SPC tools used at D2D
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