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Saturday, March 8, 2008

STAT SW/HW :)

I. complete the table

x x-mean (x-mean)^2
10
12
15
18
20
25

mean= Ex/n
median=
mode=

MAD= Ex-mean / n
S = √E(x-mean)^2 / n

II.
[a] solve
1. 8P2
2. 8C2 x 6C3
3. 8P2 - 8C3
4. 6P4 x 6P6
5. 20P3

[b] analyze & solve
1. how many ways can trish arrange her 8 books in a row?
2. how many 3digit odd #s can be made using #s 0,1,2,3...9 [no rep]
3. in rolling a pair of dice, what is the probability of getting...
--- sum of 8
--- sum of at most 8
--- sum of at least 7

[c] create a tree diagram & solve FCP
1. how many get ups can be made, if you have 2 pairs of shoes, 2 pants & 3 t-shirts?
2. how many possible routes can be made, if you wish to buy refreshments in 3 equidistant stores from your house ?

* will be passed on the day of our stat exam. 8D

posted by Chewy at 5:28 AM

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