14th Edition

ISBN: 9780134685090

Author: STEPHAN

Publisher: VST

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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 7, Problem 6PS

The weight of an energy bar is approximately normally distributed with a mean of 42.05 grams with a standard deviation of 0.025 gram.

a. What is the probability that an individual energy bar contains less than 42.035 grams?

b. If a sample of 4 energy bars is selected, what is the probability that the sample mean weight is than 42.035 grams?

c. If a sample of 25 energy bars is selected, what is the probability that the sample mean weight is less than 42.035 grams?

d. Explain the difference in the results in (a) and (c).

e. Explain the difference in the results in (b) and (c).

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 7, Problem 5PS

Chapter 7, Problem 7PS

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Chapter 7 Solutions

EBK BASIC BUSINESS STATISTICS

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Solution Summary: The author determines the probability that an energy bar weighs less than 42.035 grams. The required probability is 0.2743.

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