2nd Edition

ISBN: 9781337128629

Author: Camm

Publisher: CENGAGE L

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Textbook Question

Chapter 6, Problem 26P

Because of high production-changeover time and costs, a director of manufacturing must convince management that a proposed manufacturing method reduces costs before the new method can be implemented. The current production method operates with a mean cost of $220 per hour. A research study will measure the cost of the new method over a sample production period.

a. Develop the null and alternative hypotheses most appropriate for this study.
b. Comment on the conclusion when H₀ cannot be rejected.
c. Comment on the conclusion when H₀ can be rejected.

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 6 Solutions

ESSEN OF BUSINESS ANALYTICS (LL) BOM

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Ch. 6 - The president of Doerman Distributors, Inc.,...Ch. 6 - Prob. 12P Ch. 6 - People end up tossing 12% of what they buy at the...Ch. 6 - Prob. 14P Ch. 6 - The International Air Transport Association...Ch. 6 - Prob. 16P Ch. 6 - Health insurers are beginning to offer...Ch. 6 - The average annual premium for automobile...Ch. 6 - Prob. 19P Ch. 6 - According to Thomson Financial, last year the...Ch. 6 - The Pew Research Center Internet Project conducted...Ch. 6 - For many years businesses have struggled with the...Ch. 6 - The manager of the Danvers-Hilton Resort Hotel...Ch. 6 - The manager of an automobile dealership is...Ch. 6 - A production line operation is designed to fill...Ch. 6 - Because of high production-changeover time and...Ch. 6 - Duke Energy reported that the cost of electricity...Ch. 6 - Prob. 28P Ch. 6 - Carpetland salespersons average 8,000 per week in...Ch. 6 - Suppose a new production method will be...Ch. 6 - Prob. 31P Ch. 6 - A shareholders’ group, in lodging a protest,...Ch. 6 - Prob. 33P Ch. 6 - Prob. 34P Ch. 6 - Prob. 35P Ch. 6 - According to the National Automobile Dealers...Ch. 6 - What percentage of the population live in their...Ch. 6 - Prob. 38P Ch. 6 - Ten years ago 53% of American families owned...Ch. 6 - Prob. 40P Ch. 6 - Prob. 41P Ch. 6 - Prob. 42P Ch. 6 - The Port Authority sells a wide variety of cables...Ch. 6 - The Port Authority also wants to determine if the...Ch. 6 - Prob. 1C

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Solution Summary: The author explains that the null and alternative hypothesis for mean 220 per hour is given as: lH_0. Since the new manufacturing method reduces costs

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Chapter 6 Solutions