Question

A study on aggressive driving found that 45 % of drivers say that they have yelled at another driver. A random sample of 280 drivers in Toronto is selected and are asked whether they have yelled at other drivers.

1. What is the distribution of the number of sampled drivers who will say ”yes”, they have yelled at another driver? State only the name of the distribution.

3. What is the probability that at least 135 drivers will say ”yes”, they have yelled at another driver? [Hint: use normal approximation]

5. Use the normal approximation to calculate the probability that there will be exactly 131 sampled drivers who will say yes. [Hint: use normal approximation]

Answer #1

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