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Get Full Access to Elementary Statistics - 12 Edition - Chapter 4.4 - Problem 19bsc
Get Full Access to Elementary Statistics - 12 Edition - Chapter 4.4 - Problem 19bsc

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# Redundancy in Computer Hard Drives It is generally

ISBN: 9780321836960 18

## Solution for problem 19BSC Chapter 4.4

Elementary Statistics | 12th Edition

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Problem 19BSC

Problem 19BSC

Redundancy in Computer Hard Drives It is generally recognized that it is wise to back up computer data. Assume that there is a 2% rate of disk drive failure in a year (based on data from various sources, including “Failure Trends in Large Disk Drive Population,” by Pinhero et al. of Google, Inc.).

a. If you store all of your computer data on a single hard disk drive, what is the probability that the drive will fail during a year?

b. If all of your computer data are stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that both drives will fail during a year?

c. If copies of all of your computer data are stored on three independent hard disk drives, what is the probability that all three will fail during a year?

d. Describe the improved reliability that is gained with backup drives.

Step-by-Step Solution:
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Solution  19BSC

=0.000008

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##### ISBN: 9780321836960

Elementary Statistics was written by and is associated to the ISBN: 9780321836960. Since the solution to 19BSC from 4.4 chapter was answered, more than 488 students have viewed the full step-by-step answer. This full solution covers the following key subjects: disk, drive, data, Computer, hard. This expansive textbook survival guide covers 121 chapters, and 3629 solutions. The full step-by-step solution to problem: 19BSC from chapter: 4.4 was answered by , our top Statistics solution expert on 03/15/17, 10:30PM. This textbook survival guide was created for the textbook: Elementary Statistics, edition: 12. The answer to “Redundancy in Computer Hard Drives It is generally recognized that it is wise to back up computer data. Assume that there is a 2% rate of disk drive failure in a year (based on data from various sources, including “Failure Trends in Large Disk Drive Population,” by Pinhero et al. of Google, Inc.).a. If you store all of your computer data on a single hard disk drive, what is the probability that the drive will fail during a year?________________b. If all of your computer data are stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that both drives will fail during a year?________________c. If copies of all of your computer data are stored on three independent hard disk drives, what is the probability that all three will fail during a year?________________d. Describe the improved reliability that is gained with backup drives.” is broken down into a number of easy to follow steps, and 152 words.

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