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Chapter 13.4, Problem 25E

The price drivers pay for gasoline often varies a great deal across regions throughout the United States. The following data show the price per gallon for regular gasoline for a random sample of gasoline service stations for three major brands of gasoline (Shell, BP, and Marathon) located in 11 metropolitan areas across the upper Midwest region (OhioGasPrices.com website, March 18, 2012).

Chapter 13.4, Problem 25E, The price drivers pay for gasoline often varies a great deal across regions throughout the United

Use α = .05 to test for any significant difference in the mean price of gasoline for the three brands.

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 13 Solutions

EBK MODERN BUSINESS STATISTICS WITH MIC

Ch. 13.2 - 1. The following data are from a completely...Ch. 13.2 - 2. In a completely randomized design, seven...Ch. 13.2 - 3. Refer to exercise 2. what hypotheses are...Ch. 13.2 - Prob. 4E Ch. 13.2 - 5. In a completely randomized design, 12...Ch. 13.2 - Prob. 6E Ch. 13.2 - 7. Three different methods for assembling a...Ch. 13.2 - Prob. 8E Ch. 13.2 - 9. To study the effect of temperature on yield in...Ch. 13.2 - Prob. 10E

Ch. 13.2 - Four different paints are advertised as having the...Ch. 13.2 - Restaurant Satisfaction. The Consumer Reports...Ch. 13.3 - The following data are from a completely...Ch. 13.3 - Prob. 14E Ch. 13.3 - Testing Chemical Processes. To test whether the...Ch. 13.3 - Prob. 16E Ch. 13.3 - Marketing Ethics. In the digital age of marketing,...Ch. 13.3 - Prob. 18E Ch. 13.3 - Prob. 19E Ch. 13.3 - Minor league Baseball Attendance. The...Ch. 13.4 - Consider the experimental results for the...Ch. 13.4 - Prob. 22E Ch. 13.4 - 23. An experiment has been conducted for four...Ch. 13.4 - Prob. 24E Ch. 13.4 - The price drivers pay for gasoline often varies a...Ch. 13.4 - SAT Performance. The Scholastic Aptitude Test...Ch. 13.4 - A study reported in the Journal of the American...Ch. 13.5 - A factorial experiment involving two levels of...Ch. 13.5 - Prob. 29E Ch. 13.5 - Prob. 30E Ch. 13.5 - Amusement Park Queues. An amusement park studied...Ch. 13.5 - Prob. 32E Ch. 13.5 - Prob. 33E Ch. 13 - Prob. 36SE Ch. 13 - Prob. 37SE Ch. 13 - Assembly Methods. Three different assembly methods...Ch. 13 - In a study conducted to investigate browsing...Ch. 13 - Fuel Efficiency of Gasoline Brands. A research...Ch. 13 - Prob. 41SE Ch. 13 - Prob. 42SE Ch. 13 - Prob. 43SE Ch. 13 - Prob. 44SE Ch. 13 - CASE PROBLEM 1: WENTWORTH MEDICAL CENTER As part...Ch. 13 - CASE PROBLEM 2: COMPENSATION FOR SALES...

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Solution Summary: The author states that there is a significant difference in the mean price of gasoline for the three major brands located in 11 metropolitan areas.

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Chapter 13 Solutions