Data Management Complete Review

for factorials, the numbers must be

natural (positive whole numbers)

P(n, r) =

n!/(n-r)! (must show work. cannot only use calc unless it is a word problem and you introduce the notation)

calculating the permutations of a circle

x!/x = (x-1) x-1 is the answer

sum of terms in nth row

2^n

0! =

1

area under curve =

1

requirements for it to be a proper prob distribution

• all must be pos

• must equal to 1

game is “fair” if the expected value =

• the cost

• 0

p =

probability of success

q =

probability of failure

if n is an even number, the median is the

average between the two middle numbers

n(A)

number of elements in desired event A

n(S)

number of total elements in sample space

odds

ratio of success : fail

in terms of money, odds in favour of A =

money wagered / money won

payout =

money bet + money won

in terms of money, odds against A =

money won / money wagered

in the general term for bi theorem, r must be

a natural number

constant term

x to the exponent 0

disjoint

when two sets have no elements in common

subset

if ALL elements of one set is included in another

universal set is usually denoted as

S or U

expected value for geometric distribution is the

expected wait time until success