3rd Edition

ISBN: 9781260373561

Author: Navidi, William

Publisher: MCGRAW-HILL HIGHER EDUCATION

Concept explainers

The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of tw…

Mean, Median, Mode

It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency o…

Z-Scores

A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow compar…

Videos

Textbook Question

Chapter 7.4, Problem 29E

Flawless tiles: A new process has been designed to make ceramic tiles. The goal is to have no more than 5% of the tiles be nonconforming due to surface defects. A random sample of 1000 tiles is inspected. Let p ^ be the proportion of nonconforming tiles in the sample.

If 5% of the tiles produced are nonconforming, what is P ( p ^ ≥ 0.075 ) ?

Based on the answer to part (a), if 5% of the tiles are nonconforming, is a proportion of 0.075 nonconforming tiles in a sample of 1000 unusually large?

If the sample proportion of nonconforming tiles were 0.075, would it be plausible that the goal had been reached? Explain.

If 5% of the tiles produced are nonconforming: what is P ( p ^ ≥ 0.053 ) ?

Based on the answer to part (d), if 5% of the tiles are nonconforming, is a proportion of 0.053 nonconforming tiles in a sample of 1000 unusually large?

If the sample proportion of nonconforming tiles were 0.053, would it be plausible that the goal had been reached? Explain.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 7.4, Problem 28E

Chapter 7.5, Problem 5E

Students have asked these similar questions

Please could you explain why 0.5 was added to each upper limpit of the intervals.Thanks

28. (a) Under what conditions do we say that two random variables X and Y are independent? (b) Demonstrate that if X and Y are independent, then it follows that E(XY) = E(X)E(Y); (e) Show by a counter example that the converse of (ii) is not necessarily true.

1. Let X and Y be random variables and suppose that A = F. Prove that Z XI(A)+YI(A) is a random variable.

Chapter 7 Solutions

Elementary Statistics

Knowledge Booster

$Statistics$

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.

Solution Summary: The author explains a new process to make ceramic tiles. The goal is to have no more than 5% of the tiles be nonconforming due to surface defects.

Concept explainers

Videos

Want to see the full answer?

Chapter 7 Solutions