Tabulation of a Strike Vote Showed That 90% of Those

question 39

Multiple Choice

Tabulation of a strike vote showed that 90% of those voting cast their ballot in favour of strike action. You take a sample of 50 voters. Assume this to be a binomial distribution.
What is the probability that fewer than 40 of your sample voters are in favour of strike action?

• A) 0.2594
• B) 0.4952
• C) 0.0048
• D) 0.0091
• E) None of the choices are correct.

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Definitions:

Integral Action

A control action in which the controller output is proportional to the duration and magnitude of the error signal, commonly used in PID controllers.

Proportional Plus Derivative

A control method in feedback system design that uses a combination of the proportional and derivative actions to improve system response and stability.

PID

Proportional-Integral-Derivative closed-loop control that lets the user hold a process variable at a desired set-point.