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A student has submitted a concrete cylinder to the "strength contest" in Engineering Open House. Suppose the strength of her concrete cylinder is lognormally distributed with mean and standard deviation of 100 kips and 20 kips, respectively. She was schedules to be the last contestant for load testing. Immediately prior to her cylinder being tested, the two highest strengths in the contest thus far are 120 and 80 kips.
(a) What is the probability that she will be the first place winner?
(b) What is the probability that she will be the second-place winner?
(c) Suppose her cylinder is being tested, and it has not shown any sign of distress at a load of110 kips. What is the probability that she will win the first place?
A random sample of gasoline taxes (in cents) is shown here for 12 states. Use the data to estimate the true population mean gasoline tax with 90% confidence. Does your interval contain the national average of 44.7 cents?
This paper is a detailed and comprehensive review of statistical research performed by others on a business related topic of the student's choice.
Calculate 95% and 99% confidence intervals for m. Using the 95% confidence intervals, can we be 95% confident that m is a least 50 pounds? Explain.
1. the length of time in minutes required to complete a series of physical therapy exercises is normally distributed
The average diameter of sand dollars on a certain island is 3.60 centimeters with a standard deviation of 0.90 centimeters. If 36 sand dollars are chosen at random for a collection
Find the probability that a randomly selected student spends between eighty and ninety percent of the time on the test. Find the expected value of X. E(X)
If the names of these 100 people in the building are still unknown but a room is allowed to lodge one tenant at most , then are there how many ways of room occupation?
promising results from a specialty catalog surveythe preliminary survey results just came back on thespecialty catalog
What is the underlying variable that indirectly correlates these 2 variables? What other variables could you identify as having an indirect relationship?
How can you tell what are the solutions of a quadratic equation by looking at its graph? Explain.
The mean was 56 and the standard deviation was 20. On the second exam, she scored 82; the mean was 74 and the standard deviation was 5. On which exam did she do better?
If the power plant of this city has a daily capacity of 12 million kilowatt hours what is the probability that this power supply will be inadequate on any given day.
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