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Probability and Statistics for Engineering and the Sciences | 9th Edition | ISBN: 9781305251809 | Authors: Jay L. Devore
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Solved: The article “Nonbloated Burned Clay Aggregate

Chapter 14, Problem 23E

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QUESTION:

The article “Nonbloated Burned Clay Aggregate Concrete” (J. of Materials, 1972: 555–563) reports the following data on 7-day flexural strength of nonbloated burned clay aggregate concrete samples (psi):

\(\begin{array}{llllllllll} 257 & 327 & 317 & 300 & 340 & 340 & 343 & 374 & 377 & 386 \\ 383 & 393 & 407 & 407 & 434 & 427 & 440 & 407 & 450 & 440 \\ 456 & 460 & 456 & 476 & 480 & 490 & 497 & 526 & 546 & 700 \end{array}\)

Test at level .10 to decide whether flexural strength is a normally distributed variable.

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QUESTION:

The article “Nonbloated Burned Clay Aggregate Concrete” (J. of Materials, 1972: 555–563) reports the following data on 7-day flexural strength of nonbloated burned clay aggregate concrete samples (psi):

\(\begin{array}{llllllllll} 257 & 327 & 317 & 300 & 340 & 340 & 343 & 374 & 377 & 386 \\ 383 & 393 & 407 & 407 & 434 & 427 & 440 & 407 & 450 & 440 \\ 456 & 460 & 456 & 476 & 480 & 490 & 497 & 526 & 546 & 700 \end{array}\)

Test at level .10 to decide whether flexural strength is a normally distributed variable.

ANSWER:

Step 1 of 3

We will calculate the r value using Minitab and check if 0.05 < P-value < 0.10. 

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