19. Most people never get the chance to see a meteor shower. They are difficult to predict and sometimes the sky clouds over just at the critical moment. It happens that 13% of those who watch for at least how many hours get to see a meteor shower. Average watching time is 6 hours with a standard deviation of half an hour. Average watching time is normally distributed. Write the number of hours that you need to stare at the sky to be in that 13% to two decimal places

Answer: ________

18. Why do people go to circuses? Do they secretly hope that this time the lion will actually eat the tamer? Or that the girl will fall off the trapeze? Or to eat popcorn? Who knows? Very fortunately I spent years of my life studying this question and I came up with the concept of 'gaspability'. The longer people gasp for, the better the show. I measured the length of gasps throughout the audience and found that the mean length was 8 seconds, with a standard deviation of three seconds. And they were normally distributed. The new ringmaster said that every new act had to have a gasp-length of at least 10 seconds before it would be hired. What is the probability of an act meeting that requirement? Answer as a probability to three decimal places.

Answer: _________

17. Because of your outstanding performance in this course, Dr Bonny Henry recruits you into her team. She hasn't done stats herself for a while and asks: which calculation will mostly likely result in a parameter?

A. The average age of the people who have tested positive for COVID throughout BC

B. The average age of the people who have tested positive after turning up at the temporary test centre at UBC Vancouver

Select one:

A

B