Solution: Calculate the mean and variance for the random

Applied Statistics and Probability for Engineers | 6th Edition | ISBN: 9781118539712 | Authors: Douglas C. Montgomery, George C. Runger

ISBN: 9781118539712 55

Solution for problem 73E Chapter 3.4

Applied Statistics and Probability for Engineers | 6th Edition

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Problem 73E Problem 73E

Calculate the mean and variance for the random variable in Exercise 3-35.

3-35. The following table shows the typical depth (rounded to the nearest foot) for nonfailed wells in geological formations in Baltimore County (The Journal of Data Science, 2009, Vol. 7, pp. 111–127).

Geological Formation Group	Number of Nonfailed Wells	Nonfailed Well Depth
Gneiss	1,515	255
Granite	26	218
Loch Raven Schist	3,290	317
Mafic	349	231
Marble	280	267
Prettyboy Schist	1,343	255
Other schists	887	267
Serpentine	36	217
Total	7,726	2,027

Calculate the probability mass function of depth for nonfailed

wells from the table.

Step-by-Step Solution:

Solution:

Step 1 of 3:

The data about the typical depth for non failed wells in Baltimore Country is given.

Geological Formation Group	Number of non failed Wells	Non failed Well Depth
Gnesis	1,515	255
Granite	26	218
Loch Raven Schist	3,290	317
Mafic	349	231
Marble	280	267
Prettyboy Schist	1,343	255
Other Schist	887	267
Serpentine	36	217
Total	7,726	2,027

We have to find the mean and variance of the random variable.

Step 2 of 3

Chapter 3.4, Problem 73E is Solved

Step 3 of 3

Textbook: Applied Statistics and Probability for Engineers

Edition: 6

Author: Douglas C. Montgomery, George C. Runger

ISBN: 9781118539712

Applied Statistics and Probability for Engineers was written by and is associated to the ISBN: 9781118539712. This full solution covers the following key subjects: nonfailed, wells, depth, schist, Table. This expansive textbook survival guide covers 97 chapters, and 2005 solutions. The full step-by-step solution to problem: 73E from chapter: 3.4 was answered by , our top Statistics solution expert on 07/28/17, 07:57AM. The answer to “Calculate the mean and variance for the random variable in Exercise 3-35.3-35. The following table shows the typical depth (rounded to the nearest foot) for nonfailed wells in geological formations in Baltimore County (The Journal of Data Science, 2009, Vol. 7, pp. 111–127).Geological Formation GroupNumber of Nonfailed WellsNonfailed Well DepthGneiss1,515255Granite26218Loch Raven Schist3,290317Mafic349231Marble280267Prettyboy Schist1,343255Other schists887267Serpentine36217Total7,7262,027Calculate the probability mass function of depth for nonfailedwells from the table.” is broken down into a number of easy to follow steps, and 65 words. This textbook survival guide was created for the textbook: Applied Statistics and Probability for Engineers , edition: 6. Since the solution to 73E from 3.4 chapter was answered, more than 487 students have viewed the full step-by-step answer.