.1. Earthquake records. Measurements of engineering interest have been recordedduring earthquakes in Japan and in other parts of the world since 1800. Oneof the critical recordings is of apparent relative density, RDEN. After the com-mencement of a strong earthquake, a saturated fine, loose sand undergoes vibra-tory motion and consequently the sand may liquefy without retaining any shearstrength, thus behaving like a dense liquid. This will lead to failures in structuressupported by the liquefied sand. These are often catastrophic. The standard pen-etration test is used to measure RDEN. Another measurement taken to estimatethe prospect of liquefaction is that of the intensity at which the ground shakes.This is the peak surface acceleration of the soil during the earthquake, ACCEL.The data are from J. T. Christian and W. F. Swiger (1975), J. Geotech. Eng. Div.,Proc. ASCE, 101, GT111, 1135–1150, and are reproduced by permission of thepublisher (ASCE):RDEN ACCELRDEN ACCELRDEN ACCEL(%)(units of g)(%)(units of g)(%)(units of g)530.219300.138500.313640.219720.422440.224530.146900.5561000.231640.146400.447650.334650.684500.547680.419550.611550.204780.352750.591500.170580.363720.522550.170800.291400.258750.192550.314580.250530.2921000.377430.283700.2991000.434320.419640.292520.350400.123530.225580.334| Note: g denotes acceleration due to gravity (9.81 m/s²).Compute the sample mean x, standard deviation §, and the coefficient of skewness,81, for RDEN and ACCEL. Construct stem-and-leaf plots for each set. Comment onthe distributions. Plot the scatter diagram and calculate the correlation coefficientr. What conclusions can be reached?

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Description: .1. Earthquake records. Measurements of engineering interest have been recordedduring earthquakes in Japan and in other parts of the world since 1800. Oneof the critical recordings is of apparent relative density, RDEN. After the com-mencement of a

Mean: Mean is defined as the sum of observations divided by the number of observations. Mean(x bar)…

Math

Statistics

Compute the sample mean , standard deviation §, and the coefficient of skewness, g1, for RDEN and ACCEL. Construct stem-and-leaf plots for each set. Comment on the distributions. Plot the scatter diagram and calculate the correlation coefficient r. What conclusions can be reached?

Compute the sample mean , standard deviation §, and the coefficient of skewness, g1, for RDEN and ACCEL. Construct stem-and-leaf plots for each set. Comment on the distributions. Plot the scatter diagram and calculate the correlation coefficient r. What conclusions can be reached?

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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