Question

σ
2
=
∑
x
i
−
¯¯¯
x
N

x
=
Item given in the data
,
¯¯¯
x
=
Mean of the data
,
N
=
Total number of terms
is ____??

Answer 1

Answer:

Population mean = μ = ( Σ Xi ) / N.

Population standard deviation = σ = sqrt [ Σ ( Xi - μ )2 / N ]

Population variance = σ2 = Σ ( Xi - μ )2 / N.

Variance of population proportion = σP2 = PQ / n.

Standardized score = Z = (X - μ) / σ

Answer 2

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