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 α =.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 = ? Type your answer here AND The decision is to Choose your answer here (reject the null hypothesisfail to reject the null hypothesis.)
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 α =.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 = ? Type your answer here
AND
The decision is to Choose your answer here (reject the null hypothesisfail to reject the null hypothesis.)
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 3 images
