Explanation Given info: Assume σ 1 2 ≠ σ 2 2 , x ¯ 1 = $ 0.034 , x ¯ 2 = $ 0.033 , s 1 = $ 0.054 , s 2 = $ 0.052 , α = 0.05 , n 1 = 7 , 133 , and n 2 = 4 , 726 . Calculation: The hypotheses are given below: Null hypothesis: H 0 : μ 1 = μ 2 Alternative hypothesis: H a : μ 1 ≠ μ 2 Test statistic: Software Procedure: Step by step procedure to obtain test statistic using the MINITAB software: Choose Stat > Basic Statistics > 2-Sample t . Choose Summarized data . In first, enter Sample size as 7,133 , Mean as 0.034 , Standard deviation as 0.054 . In second, enter Sample size as 4,726 , Mean as 0.033 , Standard deviation as 0.052 . Choose Options . In Confidence level , enter 95 . In Alternative , select not equal . Click OK in all the dialogue boxes. Output using the MINITAB software is given below: From the MINITAB output, the test statistic is 1.01. Critical value: Here, variances are not equal

Elementary Statistics: Picturing the World (7th Edition)

7th Edition

ISBN: 9780134683416

Author: Ron Larson, Betsy Farber

Publisher: PEARSON

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Chapter 8, Problem 5T

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To test: Whether there is a difference in the value of coins found on a street from 1985 through 1996 for the two mint locations or not.

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Chapter 8, Problem 4T

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Select one answer. In 1912, the RMS Titanic, a British passenger ship, sank in the North Atlantic Ocean after colliding with an iceberg. 10 points Historians do not know the exact passenger list, so the death toll is estimated. Here is data from the 2201 passengers on board, by cabin class. First Second Third Crew Row Class Class Class totals Died 122 167 528 673 1490 Survived 203 118 178 212 711 Column 325 285 706 885 2201 Totals Wikipedia, RMS Titanic. (2015). Retrieved from: http://en.wikipedia.org/wiki/RMS_Titanic#Survivors_and_victims Which proportions are most useful in analyzing the relationship between passenger class and surviving the Titanic? A. O 122 / 325 and 203 / 325 B. O 203 / 325 and 528 / 706 C. O 203 / 325 and 178 /706 D. O 203 / 711 and 178 / 711

Chapter 8 Solutions

Elementary Statistics: Picturing the World (7th Edition)

Ch. 8.1 - Classify each pair of samples as independent or...Ch. 8.1 - A survey indicates that the mean annual wages for...Ch. 8.1 - A travel agency claims that the average daily cost...Ch. 8.1 - What is the difference between two samples that...Ch. 8.1 - Explain how to perform a two-sample z-test for the...Ch. 8.1 - Describe another way you can perform a hypothesis...Ch. 8.1 - What conditions are necessary in order to use the...Ch. 8.1 - Prob. 5E Ch. 8.1 - Prob. 6E Ch. 8.1 - Independent and Dependent Samples In Exercises 58,...

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To test: Whether there is a difference in the value of coins found on a street from 1985 through 1996 for the two mint locations or not.

Solution Summary: The author concludes that there is no difference in the value of coins found on a street from 1985 through 1996 for the two mint locations.

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To test: Whether there is a difference in the value of coins found on a street from 1985 through 1996 for the two mint locations or not.

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Chapter 8 Solutions