Chapter 13 Statistics Disjoint Independent

Find the area of the shaded region if the z-scores are -0.25 and 1.

• 0.4401

• 0.8413

• 0.4013

• 0.1587

Find the area of the shaded region if the z-score is 0.75

• 0.2266

• 0.7734

• 0.758

• 0.242

Find the area of the shaded region if the z-scores are -2 and -0.5

• 0.6915

• 0.3085

• 0.0228

• 0.2858

The random variable x is normally distributed with mean μ=174 and standard deviation σ=20. What is the z score if x=170?

• -0.2

• 0.2

• 2.8

• 3.4

The random variable x is normally distributed with mean μ=174 and standard deviation σ=20. What is P(x<170)?

• 0.2493

• 0.4207

• 0.5238

• 0.5938

The random variable x is normally distributed with mean μ=174 and standard deviation σ=20. What is the z score if x=200?

• -2.39

• -1.40

• 1.30

• 2.34

The random variable x is normally distributed with mean μ=174 and standard deviation σ=20. What is P(x>182)

• 0.2341

• 0.3446

• 0.4213

• 0.8765

The random variable x is normally distributed with mean μ=174 and standard deviation σ=20. What is P(172<x<192)

• 0.1231

• 0.3557

• 0.6768

• 0.9132

Find P (0 < z < 2.89). 

• 0.0047

• 0.9204

• 0.8956

• 0.4981

Find P (z < -0.51 or z > 2.6).

• 0.3097

• 0.9204

• 0.8956

• 0.4981