Excursions in Mathematics, Loose-Leaf Edition Plus MyLab Math with Pearson eText -- 18 Week Access Card Package

9th Edition

ISBN: 9780136208754

Author: Tannenbaum, Peter

Publisher: PEARSON

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

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Textbook Question

Chapter 17, Problem 50E

Exercises 49 through 52 refer to the following: Packaged foods sold at supermarkets are not always the weight indicated on the package. Variability always crops up in the manufacturing and packaging process. Suppose that the exact weight of a “12-ounce” bag of potato chips is a random variable that has an approximately normal distribution with mean μ = 12 ounces and standard deviation σ = 0.5 ounce.

If a “12-ounce” bag of potato chips is chosen at random, what are the chances that

a. it weighs somewhere between 11.5 and 12.5 ounces?

b. it weighs somewhere between 12 and 12.5 ounces?

c. it weighs more than 12.5 ounces?

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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Chapter 17, Problem 49E

Chapter 17, Problem 51E

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Chapter 17 Solutions

Excursions in Mathematics, Loose-Leaf Edition Plus MyLab Math with Pearson eText -- 18 Week Access Card Package

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Solution Summary: The author explains that packaged foods sold at supermarkets are not always the weight indicated on the package. Variability always crops up in the manufacturing and packaging process.

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