Suppose the performance of a pile foundation system is governed by the pile withthe smallest capacity. The weakest pile associated with this foundation systemfollows a type III asymptotic distribution of the smallest value with = 2 tons, amean value of 15 tons and a coefficient of variation of 20%. Determine theprobability that the weakest pile of this system will have capacity less than thedesign load of 10 tons.

The given value of the mean is equal to 15 and the value of Coefficient of variation=20%=0.2. The…

Answered: Suppose the performance of a pile…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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28. Passengers died when a particular water taxi sank. Men are typically heavier than women and children, so when loading a water taxi, assume a worst-case scenario in which all passengers are men. Assume that weights of men are normally distributed with a mean of 196 lb and a standard deviation of 41 lb. The water taxi that sank had a stated capacity of 25 passengers and the boat was rated for a load limit of 3750 lb. Complete parts (a) through (d) below . a. Given that the water taxi that sank was rated for a load limit of 3750 lb, what is the maximum mean weight of the passengers if the boat is filled to the stated capacity of 25 passengers? a. The maximum mean weight is_____________lb. (Type an integer or a decimal. Do not round. b. if the water taxi is filed with 25 randomly, what is the probability that their mean weight exceeds the value from part (a)? the probability is-____________ c. after the water taxi sank, the weight assumptions were revised so…
Statutics Bank 2 WeBWorK : MAT110E OnCampus X .csmp.missouriwestern.edu/webwork2/MAT110E_OnCampus_G/Statistics.set.2/4/?effective User=cmyers18 Previous Problem Problem List Next Problem A✰ 中 Statistics.set.2. Problem 4 (1 point) Fluorescent lighbulbs have lifetimes that are normally distributed with a mean of 6.7 years years and a standard deviation of 1.5 years. The figure below shows the distribution of lifetimes of fluorescent lightbulbs. Calculate the shaded area under the curve. Express your answer in decimal form with at least two decimal place accuracy. Answer: 5.695 7.785 Lifetimes of Fluorescent Lightbulbs Preview My Answers Submit Answers You have attempted this problem 0 times. You have unlimited attempts remaining. GO Search 5 6 Y L myp 4+ 00 144 441 8 1 O G H J K L a PRT SC 0
A light bulb manufacturer wants to compare the mean lifetimes of two of its light bulbs, model A and model B. Independent random samples of the two models were taken. Analysis of 15 bulbs of model A showed a mean lifetime of 1348 hours and a standard deviation of 81 hours. Analysis of 11 bulbs of model B showed a mean lifetime of 1351 hours and a standard deviation of 109 hours. Assume that the populations of lifetimes for each model are normally distributed and that the variances of these populations are equal. Construct a 99% confidence interval for the difference H-, between the mean lifetime u, of model A bulbs and the mean lifetime u, of model B bulbs. Then find the lower limit and upper limit of the 99% confidence interval, Carry your intermediate computations to at least three decimal places. Round your responses to at least two decimal places. (If necessary, consult a list of formulas.) Lower limit: Upper limit: Explanation Check 2021 McGraw-Hill Education. Al Rights Reserved…
According to some theorists, teenagers who spend more time with their friends in unsupervised activities are more likely to engage in delinquent conduct. You question a random sample of 2,500 high-school youths about number of hours spent in unsupervised peer activities (e.g., cruising, shopping, movies) and frequency of delinquent behavior. Unit of analysis/observation = Population = Sample = %3D Dependent variable = * Level of measurement: Independent variable = Level of measurement:
4. Researchers working for a sports drink company would like to know if a new blend if its popular sports drink can help improve marathon runners' final running time. Marathon times, Y, are known to follow a Normal distribution. Suppose that runners using the old blend sports drink have a mean finishing time of 300 minutes (µ = 300 minutes). A random sample of 20 runners was selected to use the new blend of sports drink in a marathon, finishing with an average time of 270 minutes and a standard deviation of 20 minutes (y = 270 min, s = 20 min). Can it be claimed that the new blend lowers finishing times? COr is it possible that random chance alone can explain the discrepancy? Carry out a hypothesis test of the true mean u using the 4- step procedure. Set your alpha-level to 0.05. %3D c. Which test statistic and sampling distribution under the null should we use? O i. z-score; standard Normal O ii. t-statistic; Student'st
A certain counselor wants to compare mean IQ scores for two different social groups. A random sample of 15 IQ scores from group 1 showed a mean of 117 and a standard deviation of 17 , while an independently chosen random sample of 9 IQ scores from group 2 showed a mean of 112 and a standard deviation of 15 . Assuming that the populations of IQ scores are normally distributed for each of the groups and that the variances of these populations are equal, construct a 90% confidence intervalfor the difference −μ1μ2 between the mean μ1 of IQ scores of group 1 and the mean μ2 of IQ scores of group 2 . Then find the lower limit and upper limit of the 90% confidence interval. Carry your intermediate computations to at least three decimal places. Round your responses to at least two decimal places. (If necessary, consult a list of formulas.)
Suppose that home prices (in thousands of dollars) in a certain region have a mean of 360 and a standard deviation of 180. A realtor randomly selects a sample of 90 homes in the region. Estimate the probability that the sample mean home price from the realtor's data is greater than 400 (thousand dollars). You must justify your solution, and note any assumptions you are making.
Researcher wanted to determine if carpeted rooms containe more bacteria than uncarpted rooms. Colonies of bacteria were allowed to form in the 16 Petri dishes. A normal probality plot and boxplot indicate that the data are aproximately normally distributed with no outliers. Do carpted rooms have more bacteria than uncarpted roomz at the a= 0.05 level of signicance? carpeted rooms (bacteria/cubic foot) 11.8, 8.2, 7.1, 13, 10.8, 10.1 14.6, 14 uncarpted room( bacteria/cubic foot) 12.1, 8.3, 3.8, 7.2, 12, 11.1 10.1 13.7 a) Is this independent or dependent sampling? b) State the null and alternative hypotheses c) P-value: d) state your conclusion in the langauage of the problem.
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