Question 276388
The company's technician then entered the room and used the sensor to try to determine which of the four boxes contained the explosive. The experiment consisted of 50 trials, and the technician was successful in finding the explosive 16 times. Does this indicate that the device is effective in sensing the presence of explosives? 
1. Test an appropriate hypothesis and state your conclusion.
Ho: p >= 0.5
Ha: p < 0.5
------------- 
2. Was your test one-tail lower, or two tail? Explain why you chose that kind of test in this situation.
--
One-tail lower because we are assuming a detection level higher than random.
We do not want to have a rejection interval where p-hat is a high number,
only where p-hat is a lower number.
--------------------------------------------
 
3. Explain what your P-value means in this context.
The p-value will be the probability that test results could give
stronger evidence for rejecting Ho.
================================================
Cheers,
Stan H.