ECAT Statistics Test Set 10

The normal curve is symmetrical about an imaginary vertical line which passes through the:

In normal distribution x₀.₂₅ = μ –

P(μ – 3σ < X < μ + 3σ) =

P(μ – 2σ < X < μ + 2σ) =

In a normal probability distribution, x₀.₅ =

In a normal distribution, Q.D(X) =

The area covered by a normal curve μ ± 0.6745σ covers:

The total area under normal curve is:

Curves with larger standard deviations σ are:

P(μ – σ < X < μ + σ) =

Changing _________ moves a normal curve along the axis without changing its shape.

In normal probability distribution, all odd order moments about mean are: