# Probability distribution

1. A Motor Company has purchased steel parts from a supplier for several years and has found that 10% of the parts must be returned because they are defective. An order of 25 parts is received. What are the mean and standard deviation of the defective parts?

A) Mean = 3.5; standard deviation = 2.5

B) Mean = 2.5; standard deviation = 1.5

C) Mean = 1.5; standard deviation = 2.5

D) Mean = 2.5; standard deviation = 3.5

2. A Gulf Coast travel park has the following accommodations:

Facilities

Location Cement Pad No Cement Pad Total

Beach Front 17 24 41

Non Beach 6 210 216

Total 23 234 257

What is the probability of selecting a beach front site? (Points: 2)

A) 0.1725

B) 0.3465

C) 0.1595

D) 0.2245

3. The listed occupations of stockholders of a regional electric utility company included 9 percent who were homemakers. If six of these stockholders are randomly selected, what is the probability that:

No stockholders are homemakers?

A) 0.5679

B) 0.3600

C) 0.5400

D) 0.7956

4.Given a binomial random variable with n = 15 and = 0.4, find the following probability using the binomial table. P (6 < x < 10)

A) 0.0338

B) 0.1181

C) 0.0947

D) 0.3564

https://brainmass.com/statistics/probability/probability-distribution-229067

#### Solution Summary

The solution provides step by step method for the calculation of probability from binomial distribution. . Formula for the calculation and Interpretations of the results are also included.