<PRE><B>Question 273221</B>
At a certain university, the average cost of books per student was $330 per student last semester. 
In a sample of 50 students this semester, their average cost was $355 with a standard deviation of $85. 
The Dean of Students believes that the costs are greater this semester. What is the test value for this hypothesis?
--------
test stat
t(355) = (355-330)/[85/sqrt(50)] = 2.0797..
=============
Cheers,
Stan H.
</PRE>