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Question #4 [8 pts] (a) An airline finds that 5% of the persons making reservations on a certain flight will not show up for

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Question #4 [8 pts] (a) An airline finds that 5% of the persons making reservations on a certain flight will not show up for the flight. If the airline sells 160 tickets for a flight that has only 155 seats, what is the probability that a seat will be available for every person holding a reservation and planning to fly? (5 marks) (b) A process control engineer wishes to estimate the true proportion of defective computer chips with a margin of error of no more than 0.09 and with probability 0.90. How many observations does the engineer need to include in the sample to achieve his goal? (3 marks)

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