Answered: a random sample of 10 steel rods from…

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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Question

The tensile st_ren_gth of a certain type of st_e_el rods produ_ced from a certain manu_facturer
is normally distributed with mean 400 MPa and sta_ndard dev_iati_on 25 MPa. What is the prob
that, in a random sample of 10 steel rods from this manu_fac_ture, the ten_sile stren_gths of at le_ast two st_eel ro_ds are over 430 MPa?

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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