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Let X1, X2, and X3 be independent lifetimes of memory chips. Suppose that each Xi has the normal distribution with mean 300 hours and standard deviation 10 hours. Compute the probability that at least one of the three chips last at least 290 hours.
Statistics and Probability, Statistics
Seedlings come in packages of 10 and consist of the following: 2 Douglas-fir, 3 spruce, and 5 pines. In any given package, how many ways can the 10 seedlings be arranged if seedlings that are the same species cannot be d ...
In the game of? roulette, a player can place a ?$7 bet on the number 18 and have a 1/38 probability of winning. If the metal ball lands on 18?, the player gets to keep the ?$7 paid to play the game and the player is awar ...
A tire company measures the tread on newly-produced tires and finds that they are normally distributed with a mean depth of 0.99mm and a standard deviation of 0.35mm. Find the probability that a randomly selected tire wi ...
The average starting salary for graduates at a university is $33,000 with a standard deviation of $2,000. If a histogram of the data shows that it takes on a mound shape, the empirical rule says that approximately 68% of ...
A student recieves the grades shown below, with an A worth 4 points, a B worth 3 points, a C worth 2 points, and a D worth 1 point. What is the students grade point average? A in 1 four - credit classes C in 1 three - cr ...
As an experiment, the investigators decided to take two measurements on the patient. One measurement will be made using the precise machine (withσI= 5) and the other will be made using the less precise machine (withσII= ...
Research Scenario: A community psychologist is interested in whether people's self-reported degree of religious belief predicts their self-reported feelings of well-being. She administers two questionnaires to 17 individ ...
Question 1. The U.S. Census Bureau needs to estimate the median income of females in the U.S. They collect incomes from 3500 females. Choose the best answer. Justify for full credit. (a) Which of the followings is the va ...
A basket contains 5 bananas and 5 apples. Each of ten people picks two fruits at random from the basket without replacement. (a) What is the probability that the first people picks one apple and one banana? (b) What is t ...
On a correlation matrix, you will usually see two values per comparison. The top value for a correlation measurement will be the Pearson correlation, right under that you will see a p-value. I understand when you have a ...
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Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate
Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p
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Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int
Compute the present value of an annuity of $ 699 per year for 19 years, given a discount rate of 6 percent per annum. As