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1) Find the following probabilities:
a) P (0 ≤ Z ≤ .5)
b) P (Z ≤ .5)
c) P (Z ≤ -.5)
d) P (Z ≥ .5)
e) P (- .5 ≤ Z ≤ .5)
2) Dearborn Tech produces a circuit board that has an average life span of 4,500 hours. The life span is normally distributed with a standard deviation of 500 hours. The firm is considering a 3,800 hours' warranty on the circuit board. If this warranty policy is adopted, what proportion of circuit boards should the firm expect to replace under warranty?
3) Suppose that the distribution of a random variable X is approximately exponential with a mean of 10:
a) What is the P (X ≥ 8)?
b) What is the P (X ≤ 11)?
c) What is the P (6 ≤ X ≤ 10)?
d) What is the standard deviation of X?
Use the 3-day weighted moving average method for forecasting days 4-7. Use Weight 1 day ago = 2, Weight 2 days ago = 4, and Weight 3 days ago = 3. Compare the techniques using the mean absolute deviation (MAD).
Determine by a projection the point on the hyperplane and determine a vector equation of the line of intersection of the planes
How many elephants does the researcher need to weigh so that he can be 80% confident that the average weight of elephants in his sample is within 350 pounds of the true average weight for this subspecies?
To minimize total inventory cost, Lila should order number 6 screws per order. (Please round to an integer and include no units.)
In a game of Yahtzee, you roll 5 dice each turn. What is the probability that on one turn exactly two of the dice end up with the value 3. (Hint: use the binomial distribution for this problem.)
What is the probability that the project will still finish at the originally scheduled completion date and what are the probabilities (in percent).of completing the project in 55 days, 60 days, and 65 days?
What does p
For each correlation coefficient below, calculate what proportion of variance is shared by the two correlated variables:
Choose a company and use any of the 2 (qualitative or quantitative) research and analysis methods to demonstrate selected perceptions (approved by the faculty) of the company. This project requires you to research, review, and analyze perceptions ..
1. daily airlines fies from amsterdam to london every day. the price of a ticket for this extremely popular flight
Differential equation to determine what happens to the turtle population in the long run -remote island satisfies the differential equation
I recently had to replace both front headlights on my car. The life expectancy of my headlights follows an exponential distribution with a MTBF of 1500 hours. That is, the expected number of hours until failure is 1500 hours. For the purposes of t..
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