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Two processes in a manufacturing line are performed manually: operation A and operation B. A random sample of 50 different assemblies using operation A shows that the sample average time per assembly is 8.05 minutes, with a population standard deviation of 1.36 minutes. A random sample of 38 different assemblies using operation B shows that the sample average time per assembly is 7.26 minutes, with a population standard deviation of 1.06 minutes. For a =.10, is there enough evidence in these samples to declare that operation A takes significantly longer to perform than operation B? Find the z-score to make a conclusion. (Round your answer to 2 decimal places, e.g. 1.75.) Observed z = The decision is to

Two processes in a manufacturing line are performed manually: operation A and operation B. A random sample of 50 different assemblies using operation A shows that the sample average time per assembly is 8.05 minutes, with a population standard deviation of 1.36 minutes. A random sample of 38 different assemblies using operation B shows that the sample average time per assembly is 7.26 minutes, with a population standard deviation of 1.06 minutes. For a =.10, is there enough evidence in these samples to declare that operation A takes significantly longer to perform than operation B? Find the z-score to make a conclusion. (Round your answer to 2 decimal places, e.g. 1.75.) Observed z = The decision is to

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 14PPS
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Two processes in a manufacturing line are performed manually: operation A and operation B. A random sample of 50 different assemblies using operation A shows that the sample average time per assembly is 8.05 minutes, with a population standard deviation of 1.36 minutes. A random sample of 38 different assemblies using operation B shows that the sample average time per assembly is 7.26 minutes, with a population standard deviation of 1.06 minutes. For a =.10, is there enough evidence in these samples to declare that operation A takes significantly longer to perform than operation B? Find the z-score to make a conclusion. (Round your answer to 2 decimal places, e.g. 1.75.) Observed z = The decision is to
Transcribed Image Text:Two processes in a manufacturing line are performed manually: operation A and operation B. A random sample of 50 different assemblies using operation A shows that the sample average time per assembly is 8.05 minutes, with a population standard deviation of 1.36 minutes. A random sample of 38 different assemblies using operation B shows that the sample average time per assembly is 7.26 minutes, with a population standard deviation of 1.06 minutes. For a =.10, is there enough evidence in these samples to declare that operation A takes significantly longer to perform than operation B? Find the z-score to make a conclusion. (Round your answer to 2 decimal places, e.g. 1.75.) Observed z = The decision is to
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