AP stat 2007 exam (help me with a problem)

Test Preparation AP Test Preparation
15

<p>It is E because the mean of the actual population is 19 and there is a 95% chance that the mean will fall between 16 and 22. 15 is outside this range, so is very unlikely. Although, I do not know why it says mu.</p>

<p>Can any of you help me with problems 15 and 23 on this test:
<a href=“http://www.kent.k12.oh.us/~ke_bmccombs/apstatsl/Exam%20review/2008%20released%20exam.PDF[/url]”>http://www.kent.k12.oh.us/~ke_bmccombs/apstatsl/Exam%20review/2008%20released%20exam.PDF&lt;/a&gt;&lt;/p&gt;