Stats Flashcards
1
Q
Statistics is a
A
Sample estimate
For every sample estimate there’s a corresponding population estimate
2
Q
Kurtosis measures
A
The taildness or peakness of data
3
Q
Array is
A
The arrangement of days in ascending or descending order
4
Q
Skewness is
A
The measure of symmetry and asymmetry
5
Q
Pearson first coefficient of skewness
A
Mean-mode
—————-
STD deviation
6
Q
2nd person coefficient of skewness
A
3(mean-median)
————————
STD deviation
7
Q
Quartile coefficient of skewness
A
Q3-2q2+q1
—————-
Q3-1
8
Q
Percentile
A
P90-2p50+p10
———————
P90-p10
9
Q
Coefficient of kurtosis
A
K=m4
—-
(M2)^2
10
Q
Formula for ith quartile
A
Li+ (nxi/4 - CFb) w
———————-
Fqi
