Samenvatting QRM 2 + quiz! QRM2 (E_EBE2_QRM2)

QRM 2
Samenvatting
Ordinal, nominal, interval op Ratio:




B




Continuous, discrete
categorical.
or




5.
Mean: Quantiles:
quantile Q P25 X (0,25 (n +1))
First
sample. =
=




third quartile ab
p75=x(0,75 (n+11)
=




population:
Box plots:


Standard deviation:
Sample:

population. Te
Median:
odd: Geometric
x
n mean:

n even:
G MXz....
=


Xn




↳Range
inde trimmed
↳ mean but
mean

2
skipping highest and
lowest valkes.
Variance:
x)
1, standard deviation:
Se =


(Xi -




S U5
=

, Inter Coefficient of
quaktile Range variation:

cu
=
IQR Q3 Q
=
-




Skewness:
Combinatie/permutatie:


skewed Left skewed
Right


Venn
diagram: P(A(B)
B
=




PCB(A)
B
=




->
Bayes




Binomial distribution:
(x)
E
njCE(,xi)
=
=




Variance -
Var (x)
njt(1-j)
=




(=Var ( Xi)
pCXin, s)
PDF
- 5.Cl-j)
x):


CDF -F(X: n,j) P(k:n,j)
=

, Venn
diagram independent or
mutually
exclusive




Contingency table: Independento r dependent:
Independent:p(A1B) p(A)
= fok p(B) >o



p(AnB) p(A) p(BL
5 on: =




Wp() (p(B)
24) pch(B)
7




=
= =




PCB)
↳
pctnB) pcal. p(B)
=
= A and B

ake independent.


quiz onderwerpen:binomial distributions, measures spread
for and
centrality
conditional
probability and expected values.
Measures for
centuality:
-
mean
-

Median
-Mode

Midkange
-




-


Geometaic mean
-
trimmed mean


Measures fok spread:
Range
-




-




Sample variance

sample standard
-




deviation
-


coefficient of
variation
-

Mean absolute
deviation

Rinomial
I
distribution:
x)
x

p(x
n
-




5)
x!*(
=
-




-




Voorbeeld b

, conditional
probability:
↳ denoted
PCAl B)
p(AB) B)
=
for pcBs




General law of
multiplication:p(AnB) p(A/B)p(B)
=




Expected values:
the of
sum

measure
all
of center.
X-values
weighted by their respective probabilities. It is a



the formula:
E(X) p =



[x,p(xi)
=




i1
=




the because
expected
different
value

probabilities.
is the
weighted
Because it is
average outcomes can have
E(x)
average, usually call
an we

and the
use
symbol Mr.