Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

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

image text in transcribed
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 1.14 3.34 1.54 0.08 0.12 0.60 0.72 0.92 1.05 1.43 3.05 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 0.02 0.07 0.65 0.40 0.24 1.51 1.45 1.60 1.80 4.69 0.08 7.89 1.58 1.63 0.03 0.23 0.72 LA USE SALT (a) Find the range. (b) Use a calculator to calculate Ex and Ex2. Ex = Ex2 = (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 = $2 = S = (d) Use the results of part (c) to compute the coefficient of variation. (Round your answer to the nearest whole number.) % What does this number say about time to failure? The standard deviation of the time to failure is just slightly smaller than the average time. The coefficient of variation says nothing about time to failure. The standard deviation of the time to failure is just slightly larger than the average time. The standard deviation is equal to the average. Why does a small CV indicate more consistent d CV indicates less consistent data? Explain MacBook Air

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image

Step: 3

blur-text-image

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Mathematical Analysis I

Authors: Vladimir A Zorich, Roger Cooke, Octavio Paniagua Taboada

2nd Edition

3662487926, 9783662487921

More Books

Students also viewed these Mathematics questions

Question

A students english langauge proficiency level...

Answered: 1 week ago

Question

Describe a typical technical skills training program

Answered: 1 week ago