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Probability and Statistics. Flashcards | StudBud

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Probability and Statistics.

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Questions 10

Answers

1
Not a property of combination,
n_{C_r=}n_{C_{n-r}}
n_{C_0=}n_{C_n=1}
_{n_{C_1=}n_{C_{n-1}=n}}
n-1_{C_2=1}
2
A measure of Skewness is,
S_k= M - Md
S_k = Mo - M
S_k= M-Mo
S_k = Md – M
3
What shows from the below diagram?
A∩B
A’UB
AUB’
AUB
4
Events A and B are said to be independent when,
AUB = Ω
A∩B = ф
P(AUB) = P(A).P(B)
(A∩B)∩(A∩B’)
5
What shows from the below diagram?
Intersection of A and B
A and B are Mutually Exclusive
A and B are Exhaustive
Union of A and B
6
Which Skewness is shown by the above graph?
Not Symmetric
Negatively Skewed
Positively Skewed
Symmetric
7
Measure of Dispersion,
Arithmetic Mean
Mode
Mean Deviation
Geometric Mean
8
Number of arrangements of r objects from n distinct object is given by,
n_{p_r=\frac{n!}{\left(n-r\right)!}}
n_{p_r=\frac{\left(n-1\right)!}{\left(n+1\right)!}}
r_{p_n=\frac{n!}{\left(n-1\right)!}}
n_{p_r=\frac{r!}{\left(n+1\right)!}}
9
Not a measure of central tendency that is in common use?
Mode
Harmonic Mean
Range
Median
10
What is shown by the below diagram?
AUB∩C = Ω
A∩BUC = Ω
A∩B∩C = Ω
AUBUC = Ω