Normal Probability

Which of the following is the correct expression of the probability?

Which of the following is the correct expression of the probability?

Which of the following is the correct expression of the probability?

Which of the following is the correct expression of the probability?

What's the probability x < 13?

(Mean = 10, Standard deviation = 2)

• 0.9332

• 0.2266

• 0.7734

• 0.0668

What's the probability x > 17?

(Mean = 15, Standard dev = 3)

• 0.7486

• 0.7454

• 0.2514

• 0.2546

What's the probability of x < 13 ?

(Mean = 20, Standard dev = 6.5)

• 0.1423

• 0.1401

• 0.0446

• 0.0359

What's the probability of the gray area? (Mean = 55, Standard dev = 2.5)

• 0.8185

• 0.8413

• 0.8641

• 0.8389

What's the probability of 49 < x < 51 ?

(Mean = 50, Standard dev = 6.5)

• 0.1192

• 0.1251

• 0.1587

• 0.0875

Between what two standard deviations of a normal distribution contain 68% of the data?

• one below and one above

• two below and two above

• two below and zero

• zero and two above