# The authors of the article “Predictive Model for Pitting

## Problem 77E Chapter 1

Probability and Statistics for Engineering and the Sciences | 9th Edition

• 2901 Step-by-step solutions solved by professors and subject experts
• Get 24/7 help from StudySoup virtual teaching assistants

Probability and Statistics for Engineering and the Sciences | 9th Edition

4 5 0 336 Reviews
21
4
Problem 77E

The authors of the article “Predictive Model for Pitting Corrosion in Buried Oil and Gas Pipelines” (Corrosion, 2009: 332–342) provided the data on which their investigation was based. a. Consider the following sample of 61 observations on maximum pitting depth (mm) of pipeline specimens buried in clay loam soil. Construct a stem-and-leaf display in which the two largest values are shown in a last row labeled HI. b. Refer back to (a), and create a histogram based on eight classes with 0 as the lower limit of the first class and class widths of .5, .5, .5, .5, 1, 2, 5, and 5, respectively. c. The accompanying comparative boxplot from Minitab shows plots of pitting depth for four different types of soils. Describe its important features.

Step-by-Step Solution:

Solution: Step 1 : The given data is a sample of 61 observations on maximum pitting depth (mm) of pipeline specimens buried in clay loam soil. We have to construct a stem- leaf diagram based on the given data and a histogram based on eight classes with 0 as the lower limit of the first class and class widths of .5, .5, .5, .5, 1, 2, 5, and 5. Step 2 : a) In order to make a Stem- Leaf diagram first we have to arrange the given data into ascending order. The given data itsself in arranged format 0.41 0.41 0.41 0.41 0.43 0.43 0.43 0.48 0.48 0.48 0.58 0.79 0.79 0.81 0.81 0.81 0.91 0.94 0.94 1.02 1.04 1.04 1.17 1.17 1.17 1.17 1.17 1.17 1.19 1.19 1.27 1.40 1.40 1.59 1.59 1.60 1.68 1.91 1.96 1.96 1.96 2.10 2.21 2.31 2.46 2.49 2.57 2.79 3.10 3.18 3.30 3.58 3.58 4.15 4.75 5.33 7.65 7.70 8.13 10.41 13.44 To construct a Stem-Leaf diagram we take ones digit as stem and the remaining digits as leaf. Here we repeat each stem value twice by adding L to the stem with leaves from 00 to 49 and H to stem with leaves from 50 to 99. In the form b) By taking 0 as the lower limit of the first class and class widths of .5, .5, .5, .5, 1, 2, 5, and 5. We can make histogram for the data. Class frequency 0-0.5 9 0.5-1 9 1-2-1.5 15 1.5-2 8 2-3 7 3-5 7 5-10 4 10-15 2

Step 3 of 3

#### Related chapters

Unlock Textbook Solution

Enter your email below to unlock your verified solution to:

The authors of the article “Predictive Model for Pitting

×
Log in to StudySoup
Get Full Access to Probability And Statistics For Engineering And The Sciences - 9 Edition - Chapter 1 - Problem 77e

Forgot password? Reset password here

Join StudySoup for FREE
Get Full Access to Probability And Statistics For Engineering And The Sciences - 9 Edition - Chapter 1 - Problem 77e
Already have an account? Login here
Reset your password

I don't want to reset my password

Need help? Contact support

Need an Account? Is not associated with an account
We're here to help

Having trouble accessing your account? Let us help you, contact support at +1(510) 944-1054 or support@studysoup.com

Password Reset Request Sent An email has been sent to the email address associated to your account. Follow the link in the email to reset your password. If you're having trouble finding our email please check your spam folder
Already have an Account? Is already in use
Incorrect Password The password used to log in with this account is incorrect

Forgot password? Reset it here