3- Central Tendency Flashcards
1
Q
range
A
the difference covered by the scores in a distribution (difference between largest and smallest score)
[range= (Xmax - Xmin)]
2
Q
deviation
A
distance from the mean
3
Q
how to find variance
A
sum of squares / number of scores (SS/n)
4
Q
how to find sum of squares
A
SS= ∑(x- μ ) ²
5
Q
Population Order
A
1) calculate μ (mean)
2) calculate SS (sum of squares)
3) calculate 𝜎² (variance)
4) calculate 𝜎 (standard deviation)
6
Q
Samples Order
A
1) calculate M (mean)
2) calculate SS (sum of squares)
3) calculate s² (variance)
4) calculate s (standard deviation)
7
Q
how to combine sample means…
A
1) add both ∑X and n’s
2) M= ∑X (total) / n (total)
