"suppose that it is decided to reject the null hypothesis if the sample mean time lag is less than 18.5 days. what is the probab
2 answers:
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Given that , we have
, so that
Take the derivative and find the critical points of :
Take the second derivative and evaluate it at the critical point:
Since is positive for all
, the critical point is a minimum.
At the critical point, we get the minimum value .
Answer:
The double shaded region
