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- The commuter trains on the Sliver Line for the Washington Metropolitan Area Transit Authority (WMATA) operate every twenty minutes during late night (9:30 pm to close). Assume the distribution of the waiting time is a uniform distribution.
-Find the height for this uniform distribution.
-Find the probability of waiting more than 10 minutes.
What is the probability that a man selected at random has children?
It is known that 15% of US home mortgages are under water (i.e. the homeowner owes more than the house is worth). Suppose 18 mortgages are randomly selected (assume independence). Let the random variable X equal the number that are under water.
Assume that each unit sold generates $70 in revenue and that each unit ordered cost $50. If the monthly order quantity is chosen to be 500 units, what is the expected monthly profit? (note: Profit=Revenue - Cost)
Suppose the timing device used in the men's race failed to activate at the start of the race and instead began to record the times seconds
a set of test scores is normally distributed with a mean of 100 and a standard deviation of 15. if cases are drawn
Let y = sales at a fast-food outlet (1000s of $), x1 = number of competing outlets within a 1-mile radius, x2= population within a 1-mile radius (1000s of people), and x3 be an indicator variable that equals 1 if the outlet has a drive-up window an..
Construct a pie chart to display United States refinery yields by product per day. Display the refinery yields data for each product category as a percentage.
A. Set of one or more outcomes B. Events that cannot happen simultaneously C. Activity with an observable result
The producers of a new toothpaste claim that it prevents more cavities than other brands of toothepaste. A random of 60 people used the new toothpaste for 6 months.
Perform the test as it should have been done and find if you come to a different conclusion. Explain why the results were different and why your test was a stronger and more reliable test.
Interpret the sign of each of the regression coef?cients given in the table. For EI/predicted BMR, data values ranged between 1.4 and 2.8 with a low value associated with underreporting of energy intake.
Based on a study of heights of men and women who do gymnastics, a researcher concludes that the exercise from playing gymnastics causes people to become shorter. Do you agree with this conclusion?
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