3rd Edition

ISBN: 9780135163146

Author: Gould

Publisher: PEARSON

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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 9, Problem 56SE

Pulse and Gender: CI Using data from NHANES, we looked at the pulse rate for nearly 800 people to see whether it is plausible that men and women have the same population mean. NHANES data are random and independent. Minitab output follows.

Chapter 9, Problem 56SE, Pulse and Gender: CI Using data from NHANES, we looked at the pulse rate for nearly 800 people to

a. Are the conditions for using a confidence interval for the difference between two means met?

b. State the interval in a clear and correct sentence.

c. Does the interval capture 0? Explain what that shows.

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

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Chapter 9, Problem 55SE

Chapter 9, Problem 57SE

Chapter 9 Solutions

INTRODUCTORY STATISTICS (LOOSELEAF)

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Solution Summary: The author explains that the Minitab output for two sample t-interval determines whether the confidence interval for the difference between the two means is met or not.

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