Rules for Means
Rule 1:If X atd Y are tandom varlables, then
Rule 2:
IfXis
a
PLx
*v = llx + tQ
random variable and a and b are constants, then P"+bx = a + bqx
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play. You
Example 1 1: You go to a casino and play the same slot machine which averages losing
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Problems on Bitromial
For each problem, be sure
questions (show the formu
11 800) ofthe graduates o Northeast High who apply to Penn State University are admitted. Last year, there
wgfe 6 graduates ftom ortheast who applied to Penn State. what i
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t.
t* lnfinnsns*
Unoccupied
on flights cause airlines to lose revenue. Suppose a large airline wants to estimate
of unoccupiedl seats per flighr An sRS of Lzs flights shows a sample averag: of
suppose o=4.1 and create a 90% confidence intervar f