Fundamentals of Statistics (5th Edition)
5th Edition
ISBN: 9780134508306
Author: Michael Sullivan III
Publisher: PEARSON
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Chapter B.4, Problem 5AYU
Voice-Recognition Systems Have you ever been frustrated by computer telephone systems that do not understand your voice commands? Quite a bit of effort goes into designing these systems to minimize voice-recognition errors. Researchers at the Oregon Graduate Institute of Science and Technology developed a new method of voice recognition (called a remapped network) that was thought to be an improvement over an existing neural network. The data shown in the next column are based on results of their research. Does the evidence suggest that the remapped network has a different proportion of errors than the neural network? Use the α = 0.05 level of significance.
Source: Wei, Wei, Leen, Todd, Barnard, and Etienne, “A Fast Histogram-Based Postprocessor That Improves Posterior Probability Estimates.” Neural Computation 11:1235–1248.
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An automobile dealer conducted a test to determine if the time in minutes needed to complete a minor engine tune-up depends on whether a computerized engine analyzer or an electronic analyzer is used. Because tune-up time varies among compact, intermediate, and full-sized cars, the three types of cars were used as blocks in the experiment. The data obtained follow.
Analyzer
computerized
electronic
Car
compact
50
41
Intermediate
56
45
Full Sized
62
46
Use ? = 0.05 to test for any significant differences.
State the null and alternative hypotheses.
H0: ?Computerized = ?ElectronicHa: ?Computerized ≠ ?ElectronicH0: ?Computerized ≠ ?ElectronicHa: ?Computerized = ?Electronic H0: ?Computerized = ?Electronic = ?Compact = ?Intermediate = ?Full-sizedHa: Not all the population means are equal.H0: ?Compact = ?Intermediate = ?Full-sizedHa: ?Compact ≠ ?Intermediate ≠ ?Full-sizedH0:…
You may need to use the appropriate technology to answer this question.
An automobile dealer conducted a test to determine if the time in minutes needed to complete a minor engine tune-up depends on whether a computerized engine analyzer or an electronic analyzer is used. Because tune-up time varies among compact, intermediate, and full-sized cars, the three types of cars were used as
blocks in the experiment. The data obtained follow.
Analyzer
Computerized
Electronic
Compact
50
41
Car
Intermediate
54
44
Full-sized
64
47
Use a = 0.05 to test for any significant differences.
State the null and alternative hypotheses.
O Ho: MCompact = "Intermediate = HFull-sized
H: "Compact * "Intermediate * "Full-sized
O Ho: "Compact * "Intermediate * HFull-sized
H: "Compact "Intermediate = "Full-sized
O Ho: Computerized = HElectronic
H: "Computerized * HElectronic
O Ho: "Computerized = HElectronic = "Compact = Intermediate = Full-sized
H: Not all the population means are equal.
O Ho: HComputerized *…
Chapter B.4 Solutions
Fundamentals of Statistics (5th Edition)
Ch. B.4 - Skill Building In Problems 1 and 2, test whether...Ch. B.4 - In Problems 1 and 2, test whether the population...Ch. B.4 - NW 3. Hazardous Activities In a survey of 3029...Ch. B.4 - Income Taxes A Gallup organization survey asked...Ch. B.4 - Voice-Recognition Systems Have you ever been...Ch. B.4 - Poison Ivy Look back at the data in Table 3 on...Ch. B.4 - Gun Laws and Capital Punishment The General Social...Ch. B.4 - Children and Childcare The General Social Survey...
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