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1. Of 600 car parts produced, it is known that 350 are produced in one plant, 150 parts in a second plant, and 100 parts in a third plant. Also it is known that the probabilities are 0.15, 0.2, and 0.25 that the parts will be defective if they are produced in the ?rst, second, or third plants, respectively. What is the probability that a randomly picked part from this batch is not defective?
2. One class contains 5 girls and 10 boys and a second class contains 13 boys and 12 girls. A student is randomly picked from the second class and transferred to the ?rst one. After that, a student is randomly chosen from the ?rst class. What is the probability that this student is a boy?
consider the following simple model for daily changes in the price of a stock. suppose that on each day the price
Credit card companies have aggressively solicited new accounts from students who are new homeowners. Suppose that a sample of 150 new homeowners indicated the following information as to whether they possessed a Visa Card or an American Express Ca..
find the probability of correctly answering the first 2 questions on a multiple choice test if random guesses are made
A researcher computes the regression equation for a sample of n = 25 pairs of scores, X and Y values. If an analysis of regression is used to test the signifi- cance of the equation, what are the df values for the F-ratio?
If light bulbs failure times are identically and independently distributed, what shape would you expect for the hazard function of the light bulbs? Draw a picture and explain.
to be able to conduct a t-test it is importantthat the independent- as well as the dependent variable is measured on a
A laboratory scale is known to have a standard deviation of = 0.001 gram in repeated weighings. Scale readings in repeated weighings are normally distributed, with mean equal to the true weight of the specimen.
Entities arrive at single-server queuing system at average of 4 per hour and server can service average of 5 per hour. Mean in the queue is?
Assume x is normally distributed with mean u=15 and standard deviation 0=3. Use the approximate areas beneath the normal curve, as discussed in this section, to answer the following questions.
The sticker on the car states that it gets 24 mpg on the highway, but measurements show that its highway mileage is actually 32 MPG. Find the values of the absolute and relative errors. Round to the nearest integer as needed
a job only hires applicants who score 2 standard deviations or more above the mean on a skills test. if the mean is 77
state techs basketball team the fighting logarithms have a 70 foul-shooting percentage. write a formula for the exact
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