A bank Manager developed a new System to reduce the time customers spend waiting for a teller
service during peak hours. The Manager hopes that the new system will reduce the waiting time
hypothesis and alternative hypothesis needed if we want to attempt to provide evidence
the 100 waiting times to support the claim that the mean waiting time under new system is shorter
than 6 minutes.
from the current 9 to 10 minutes to less than 6 minutes. Suppose that the Managerwishes to use
a)Letting µ represent the mean waiting time under the new system, set up the null
b)In the context of this situation interpret making a type I error, interpret making a type II error
supporting claim that µ is shorter than 6 minutes.
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