Normal Distribution

The curve is _________________ about its center.

• Symetrical

• Symmetrical

• Asymetrical

• Symetry

The width of the curve is determined by the _____________________.

• Mean

• Variation

• Standard Deviation

• Standard Normal Curve

A standard normal curve is a normal probability distribution that has a standard deviation of ____ and a mean of ____.

• 1, 0

• 0, 1

• 0, 0

• 1, 1

What is the formula to find the corresponding z-score for population data?

• z = X - μ / σ

• z = (X - μ) / σ

• z = μ - X / σ

• z = (μ - X) / σ

Which of the following is NOT TRUE?

• The mean, median, and the mode are equal.

• The curve is asymptotic to the base line.

• The total area under the curve is less than 1.

• The curve is symmetrical about its center.

Find the corresponding z-score when X = 40, μ = 30 and σ = 5.

• 1

• -2

• 2

• -1

Find the corresponding z-score of a PE score of 39 given that μ = 45 and σ = 6.

• 1

• -2

• 2

• -1

Find the raw score given z = -1.5, μ = 26, and σ = 4.

• 20

• 32

• 28

• 30

Find the raw score given z = 2, μ = 50, and σ = 4.

• 46

• 50

• 54

• 58

What is the area under the normal curve between z = -2 and z = 2?

• 0.9544

• 0.9554

• 0.6826

• 0.6286