SOLUTION: A digital camcorder repair service has set a goal not to exceed an average of 5 working days from the time the unit is brought in to the time repairs are completed. A random sampl

Question 140976: A digital camcorder repair service has set a goal not to exceed an average of 5 working days from the time the unit is brought in to the time repairs are completed. A random sample of 12 repair records showed the following repair (in days) 9,2,5,1,5,4,7,5,11,3,7,2. At a=.05 is the goal being met?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A digital camcorder repair service has set a goal not to exceed an average of 5 working days from the time the unit is brought in to the time repairs are completed. A random sample of 12 repair records showed the following repair (in days) 9,2,5,1,5,4,7,5,11,3,7,2. At a=.05 is the goal being met?
----------------------------------------
Ho: u <= 5 (goal)
Ha: u > 5
---------------
x-bar = 5.08333333...
s = 2.998737....
t(5.08333) = (5.08333 - 5)/2.9987.../sqrt(12) = 0.096267
p-value for one-tail test with df=11 is P(0.096267 < t < 10) = 0.4625...
-----------------
Conclusion:
Since p-value is greater than 5% fail to reject Ho.
The goal is being met.
=========================
Cheers,
Stan H.
RELATED QUESTIONS
A digital camcorder repair service has set a goal not to exceed an average of 5 working... (answered by stanbon)

Please help! I cannot figure out how to set this problem up. I have to include the cost... (answered by checkley71)

Your washing machine has stopped working. Acme repair charges $100 for a service call... (answered by solver91311)

Your washing machine has stopped working. Acme Repair charges $100 for a service call... (answered by nerdybill)

An automotive repair shop has determined that the average service time on an automobile... (answered by stanbon)

3. As a professional photographer, Marion has seen the trend away from film cameras as... (answered by lplaud84)

The time to repair an electronic device is a normally distributed random variable... (answered by solver91311)

The time to repair an electronic device is a normally distributed random variable... (answered by richwmiller)

The time to repair an electronic device is a normally distributed random variable... (answered by stanbon)