7th Edition

ISBN: 9781337372763

Author: BRASE

Publisher: Cengage Learning

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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 8.1, Problem 13P

Basic Computation: Sample Size Suppose x has a mound-shaped distribution with σ = 3 .

(a) Find the minimal sample size required so that for a 95 % confidence interval, the maximal margin of error is E = 0.4.

(b) Check Requirements Based on this sample size, can we assume that the x ¯ distribution is approximately normal? Explain.

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.

Expert Solution & Answer

Chapter 8 Solutions

UNDERSTANDING BASIC STAT LL BUND >A< F

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