Question 17 If X has a Poisson distribution with (or )=5, then P(X < 10) = ________ . 0.9863 0.9682 0.0363 0.0181 None of the above

Question 18 A company that sells annuities must base the annual payout on the probability distribution of the length of life of the participants in the plan. Suppose the probability distribution of the lifetimes of the participants is approximately a normal distribution with a mean of 68 years and a standard deviation of 3.5 years. What proportion of the plan recipients would receive payments beyond age 75? 0.1465 0.9772 0.0228 0.8535 None of the above

Question 19 The number of 911 calls in Toronto, Ontario, has a mean of 10 calls a day. The probability of seven 911 calls in a day is ____________. 0.0901 0.8666 0.1044 0.2202 None of the above

Question 20 The number of 911 calls in Toronto, Ontario, has a mean of 10 calls a day. The probability of more than ten 911 calls in half a day is ____________. 0.0318 0.0137 0.5421 0.417 None of the above

Question 21 You were told that the mean score on a statistics exam is 75 and standard deviation is 9 with the scores normally distributed. The middle 86.64% of the students will score between which two scores? (rounded to an integer) -74 and 92 56 and 94 61 and 89 104 and 122 None of the above

Question 22 The amount of time necessary for assembly line workers to complete a product is normally distributed with a mean of 15 minutes and a standard deviation of 2 minutes. The probability is __________ that a product is assembled in between 16 and 21 minutes. 0.4998 0.3072 0.0727 0.4938 None of the above