1.A factory has a machine that dispenses 80ml of fluid in a bottle. An employee believes the average amount of fluid is not 80ml. Using 40 samples, he measures the average amount dispensed by the machine to be 78ml with a standard deviation of 2.5. At a 95% confidence level, is there enough evidence to support the idea that the machine is now working properly?
1.A factory has a machine that dispenses 80ml of fluid in a bottle. An employee believes the average amount of fluid is not 80ml. Using 40 samples, he measures the average amount dispensed by the machine to be 78ml with a standard deviation of 2.5. At a 95% confidence level, is there enough evidence to support the idea that the machine is now working properly?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.1: Measures Of Center
Problem 4GP
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1.A factory has a machine that dispenses 80ml of fluid in a bottle. An employee believes the average amount of fluid is not 80ml. Using 40 samples, he measures the average amount dispensed by the machine to be 78ml with a standard deviation of 2.5. At a 95% confidence level, is there enough evidence to support the idea that the machine is now working properly?
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