a 3-point scale. Let X denote the rating given by expert A and Y denote the rating given by B. The following table gives the joint distribution for X and Y . 4.12 If a dealer’s profit‚ in units of $5000‚ on a new automobile can be looked upon as a random variable X having the density function fx= 21-x‚0<x<10‚elsewhere find the average profit per automobile. 4.14 Find the proportion X of individuals who can be expected to respond to a certain mail-order solicitation if X has the density function
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degree. Contemporary memory competition was initiated in 1991 and the first United States championship was held in 1997.[6] Part of the competition requires committing to memory and recalling a sequence of digits‚ two-digit numbers‚ alphabetic letters‚ or playing cards. In a simple method of doing this‚ contestants‚ using various strategies well before competing‚ commit to long-term memory a unique vivid image associated with each item. They have also committed to long-term memory a familiar route with
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age people’s privacy is almost non-existent due to new laws and social media. Others would argue quite the opposite. The argument of random drug testing in schools is a modern day idea that can solve many problems‚ but can also create problems too. Both sides of the argument bring up many valid points‚ all of which are from credible sources. Whether they think random drug testing in schools is harmful to students’ rights or that the benefits of drug testing outweigh the preferred privacy of the students
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Math 156–Sat: HW #4 Name: 1. What is the difference between [pic] and[pic]? Between s and[pic]? (10 points) 2. Explain the difference between [pic] and [pic] and between [pic] and[pic]? (10 points) 3. Suppose that a random sample of size 64 is to be selected from a population having [pic] and standard deviation 5. (a) What are the mean and standard deviation of the [pic] sampling distribution? Can we say that the shape of the distribution is approximately
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Patti Pangallo GE217 14 November 2011 Mandatory Random Drug Testing Crunch! A warehouse employee’s foot has just been run over by a forklift driver. During the accident investigation it was discovered that the forklift driver had been under the influence of marijuana. No one wants his/her doctor to be drunk or high on drugs as he slices him/her open with a scalpel. Regardless if the operation is successful‚ he/she will be much happier knowing the doctor was not impaired. A person
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are lifted at a time. Compute the probability of an accident. [0.1587] 3. A soft –drink vending machine is set so that the amount of drink dispensed is a random variable with a mean of 200 milliliters and a standard deviation of 15 milliliters. What is the probability that the mean amount dispensed in a random sample of size 36 is at least 204 milliliters? [0.0548] 4. An automatic machine in a manufacturing process is operating properly if the lengths of an important
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ABSTRACT A conducting plastic has been used to create a new memory technology which has the potential to store a mega bit of data in a millimeter- square device-10 times denser than current magnetic memories. This device is cheap and fast‚ but cannot be rewritten‚ so would only be suitable for permanent storage. The device sandwiches a blob of a conducting polymer called PEDOT and a silicon diode between perpendicular wires. The key to the new technology was discovered by
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"A Random Walk Down Wall Street" There is a sense of complexity today that has led many to believe the individual investor has little chance of competing with professional brokers and investment firms. However‚ Malkiel states this is a major misconception as he explains in his book "A Random Walk Down Wall Street". What does a random walk mean? The random walk means in terms of the stock market that‚ "short term changes in stock prices cannot be predicted". So how does a rational investor determine
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Although‚ many pupils feel it is a violation of privacy to have random locker searches‚ other students feel that it increases their safety and prevents bullying. There are many schoolchildren in the world that would feel impervious to harm if the school officials would conduct random locker searches. The antagonizes in the school system would be thwarted because the school officials would find their barbarous comments and notes‚ and would find themselves in serious trouble. First and foremost
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CHAPTER 5 • THE MEMORY SYSTEM PROBLEMS - Cap. 9 - Sistema di memoria 5.1 Give a block diagram similar to the one in Figure 5.10 for a 8M × 32 memory using 512K × 8 memory chips. 5.2 Consider the dynamic memory cell of Figure 5.6. Assume that C = 50 femtofarads (10−15 F) and that leakage current through the transistor is about 9 picoamperes (10−12 A). The voltage across the capacitor when it is fully charged is equal to 4.5 V. The cell must be refreshed before this voltage drops
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