ASQ
CSSBB · Question #225
A sample of size 50 from machine A has a mean of 18.2 and standard deviation 3.1. A sample of size 40 from machine B has mean 17.6 and standard deviation 2.8. Do these data indicate that the…
The correct answer is B. no. See the full explanation below for the reasoning.
Analyze Phase
Question
A sample of size 50 from machine A has a mean of 18.2 and standard deviation 3.1. A sample of size 40 from machine B has mean 17.6 and standard deviation 2.8. Do these data indicate that the population for machine A has a larger mean? Assume the populations are normal.
Options
- Ayes
- Bno
How the community answered
(38 responses)- A26% (10)
- B74% (28)
Topics
#two-sample hypothesis test#z-test#mean comparison#inference
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