The article "Mix Design for Optimal Strength Development of Fly Ash Concrete" (Cement and Concrete Research, 1989, Vol. 19, No. 4, pp. 634-640) investigates the compressive strength of concrete when mixed with fly ash (a mixture of silica, alumina, iron, magnesium oxide, and other ingredients). The compressive strength for nine samples in dry conditions on the twenty-eighth day are as follows (in megapascals): 40.2 30.4 28.9 30.5 22.4 25.8 18.4 14.2 15.3 Find a 95% prediction interval on the next sample that will be tested. Assume population is approximately normally distributed.
The article "Mix Design for Optimal Strength Development of Fly Ash Concrete" (Cement and Concrete Research, 1989, Vol. 19, No. 4, pp. 634-640) investigates the compressive strength of concrete when mixed with fly ash (a mixture of silica, alumina, iron, magnesium oxide, and other ingredients). The compressive strength for nine samples in dry conditions on the twenty-eighth day are as follows (in megapascals): 40.2 30.4 28.9 30.5 22.4 25.8 18.4 14.2 15.3 Find a 95% prediction interval on the next sample that will be tested. Assume population is approximately normally distributed.
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
Related questions
Question
How do you solve? Ref W9A3
![The article “Mix Design for Optimal Strength Development of Fly Ash Concrete” (*Cement and Concrete Research*, 1989, Vol. 19, No. 4, pp. 634–640) investigates the compressive strength of concrete when mixed with fly ash (a mixture of silica, alumina, iron, magnesium oxide, and other ingredients). The compressive strength for nine samples in dry conditions on the twenty-eighth day are as follows (in megapascals):
\[
40.2, \quad 30.4, \quad 28.9, \quad 30.5, \quad 22.4, \quad 25.8, \quad 18.4, \quad 14.2, \quad 15.3
\]
Find a 95% prediction interval on the next sample that will be tested. Assume population is approximately normally distributed.
Round your answers to 2 decimal places.
\[
\Box \quad \leq \quad x_{n+1} \quad \leq \quad \Box
\]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F453530fe-df7b-40e0-87f7-364c227f8f51%2Fa7bd3d18-290e-460d-9ee1-b6cdbc79c8e6%2F29rnk8h_processed.png&w=3840&q=75)
Transcribed Image Text:The article “Mix Design for Optimal Strength Development of Fly Ash Concrete” (*Cement and Concrete Research*, 1989, Vol. 19, No. 4, pp. 634–640) investigates the compressive strength of concrete when mixed with fly ash (a mixture of silica, alumina, iron, magnesium oxide, and other ingredients). The compressive strength for nine samples in dry conditions on the twenty-eighth day are as follows (in megapascals):
\[
40.2, \quad 30.4, \quad 28.9, \quad 30.5, \quad 22.4, \quad 25.8, \quad 18.4, \quad 14.2, \quad 15.3
\]
Find a 95% prediction interval on the next sample that will be tested. Assume population is approximately normally distributed.
Round your answers to 2 decimal places.
\[
\Box \quad \leq \quad x_{n+1} \quad \leq \quad \Box
\]
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, probability and related others by exploring similar questions and additional content below.Recommended textbooks for you
A First Course in Probability (10th Edition)
Probability
ISBN:
9780134753119
Author:
Sheldon Ross
Publisher:
PEARSON
A First Course in Probability (10th Edition)
Probability
ISBN:
9780134753119
Author:
Sheldon Ross
Publisher:
PEARSON