Foundation Design: Principles and Practices (3rd Edition)
3rd Edition
ISBN: 9780133411898
Author: Donald P. Coduto, William A. Kitch, Man-chu Ronald Yeung
Publisher: PEARSON
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Textbook Question
Chapter 2, Problem 2.4QPP
Using a random number generator create a sample of four relative densities using the PDF presented in Figure 2.2. Repeat the exercise to create three different sample sets. Compute the mean and standard deviation of your sample. Compute the mean and standard deviation of each sample set. Compare the means and standard deviations of your samples with each other and with the mean and standard deviation of the original distribution. Discuss the differences among the sample sets and the original distribution, including the type of uncertainties you are dealing with. How many samples do you think are needed to reliably determine the mean and standard deviation of the relative density of this particular soil?
Figure 2.2
Histogram and the corresponding normal distribution of dry unit weight of a compacted soil at a road site in Los Alamos, New Mexico.
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Students have asked these similar questions
24. What test can be used to test the difference between two sample
means when the population variances are know
A. Z-test
B. Chi-Square Test
C. t-Test
D. F-Test
For a normally-distributed sample of n = 25 from a population with mean value 70 and standard deviation 1.6, use the appropriate table to compute: P(70.5 ≤ x ).
the allowed discrepancy for the t-test is 2σ. This means that if your result from the t-test is smaller than 2, there is a 95% probability that the two measurements represent the same quantity and therefore, they are consistent with each other.When a set of data is inconsistent, it indicates that
Select one:
a. The experiment is incorrect and unreliable.
b. There was a calculation mistake.
c. The uncertainty on the measurements has been overestimated.
d. There are some unknown systematic errors in some or all of the measurements.
Chapter 2 Solutions
Foundation Design: Principles and Practices (3rd Edition)
Ch. 2 - Classify the uncertainty associated with the...Ch. 2 - Figure 2.1 shows the PDF for a normal distribution...Ch. 2 - List three sources of epistemic uncertainty...Ch. 2 - Using a random number generator create a sample of...Ch. 2 - A certain column will carry a dead load estimated...Ch. 2 - A simply supported beam has a length of 3 m and...Ch. 2 - Using the data shown in Figure 2.5 determine the...Ch. 2 - The capacity for a certain foundation system is...Ch. 2 - We wish to design a shallow foundation with a...Ch. 2 - Prob. 2.10QPP
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