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:
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)
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?
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.