Kevlar epoxy is a material used on the NASA space shuttles. Strands of this epoxy were tested at the 90% breaking strength. The following data represent time to failure (in hours) for a random sample of 50 epoxy strands. Let x be a random variable representing time to failure (in hours) at 90% breaking strength.0.551.801.522.051.031.180.801.331.291.153.341.540.080.120.600.720.921.051.433.011.812.170.630.560.030.090.180.341.511.451.520.191.550.010.070.650.400.241.511.451.601.804.690.087.891.581.620.030.230.72 (b) Use a calculator to calculate Σx and Σx2.Σx= Σx2= (c) Use the results of part (b) to compute the sample mean, variance, and standard deviation for the time to failure. (Round your answers to four decimal places.)x= s2= s= (d) Use the results of part (c) to compute the coefficient of variation. (Round your answer to the nearest whole number.) % Kevlar epoxy is a material used on the NASA space shuttles. Strands of this epoxy were tested at the 90% breaking strength. The following data represent time to failure (in hours) for arandom sample of 50 epoxy strands. Let x be a random variable representing time to failure (in hours) at 90% breaking strength.0.55 1.80 1.52 2.05 1.03 1.18 0.80 1.33 1.29 1.153.34 1.54 0.08 0.12 0.60 0.72 0.92 1.05 1.43 3.011.81 2.17 0.63 0.56 0.03 0.09 0.18 0.34 1.51 1.451.52 0.19 1.55 0.01 0.07 0.65 0.40 0.24 1.51 1.451.60 1.80 4.69 0.08 7.89 1.58 1.62 0.03 0.23 0.72In USE SALT(a) Find the range.7.88(b) Use a calculator to calculate Ex and Ex2.Ex =Ex? =(c) Use the results of part (b) to compute the sample mean, variance, and standard deviation for the time to failure. (Round your answers to four decimal places.)X =s2 =s =(d) Use the results of part (c) to compute the coefficient of variation. (Round your answer to the nearest whole number.)X %

Answered: Kevlar epoxy is a material used on the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Question

Kevlar epoxy is a material used on the NASA space shuttles. Strands of this epoxy were tested at the 90% breaking strength. The following data represent time to failure (in hours) for a random sample of 50 epoxy strands. Let x be a random variable representing time to failure (in hours) at 90% breaking strength.

0.55	1.80	1.52	2.05	1.03	1.18	0.80	1.33	1.29	1.15
3.34	1.54	0.08	0.12	0.60	0.72	0.92	1.05	1.43	3.01
1.81	2.17	0.63	0.56	0.03	0.09	0.18	0.34	1.51	1.45
1.52	0.19	1.55	0.01	0.07	0.65	0.40	0.24	1.51	1.45
1.60	1.80	4.69	0.08	7.89	1.58	1.62	0.03	0.23	0.72

(b) Use a calculator to calculate Σx and Σx².

Σx	=
Σx²	=

(c) Use the results of part (b) to compute the sample mean, variance, and standard deviation for the time to failure. (Round your answers to four decimal places.)