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Ryan
Ryan, Engineer
Category: Calculus and Above
Satisfied Customers: 8882
Experience:  B.S. in Civil Engineering
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(TCO B) According to a survey by the Opinion Research Corporation,

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(TCO B) According to a survey by the Opinion Research Corporation, 60% of all clerical workers in the United States “liked their jobs very much.” A random sample of 15 clerical workers is selected. Find the probability that

a. exactly nine of these clerical workers “liked their jobs very much.”
b. at least seven of these clerical workers “liked their jobs very much.”
c. fewer than five of these clerical workers “liked their jobs very much.” (Points : 18)
Hi,

Do you know if you are expected to determine an exact value using the binomial probability calculation, or if you are supposed to use the normal approximation to the binomial distribution?

Thanks,

Ryan
Customer: replied 3 years ago.
Both
Hi,

Ok, I'll write up the solution using both methods. I'll have it posted for you as soon as I can.

Thanks,

Ryan
Customer: replied 3 years ago.
Thanks
Hi again,

Thank you for your patience.

Here are the solutions:

Probabilities

As always, please feel free to ask if you have questions about any of these solutions.

Thanks,

Ryan
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