i. Suppose in a district grade 1 through grade 5, 60 percent of the population favor a particular school. A simple random sample of 350 is surveyed. a. What is the probability that at least 140 favor the school? b. What is the probability that at most 170 favor the school? c. What is the probability that more than 160 favor the school? d. What is the probability that fewer than 145 favor the school? e. What is the probability that exactly 180 favor the school? ii. The annual number of earthquakes registering at least 2.5 on the Richter Scale and having an epicenter within 40 miles of downtown Memphis follows a Poisson distribution with mean 6.5. a. What is the probability that at least 9 such earthquakes will strike next year? b. What is the probability that at least 25 such earthquakes will strike during the next 5 years?
i. Suppose in a district grade 1 through grade 5, 60 percent of the population favor a particular school. A simple random sample of 350 is surveyed.
a. What is the
b. What is the probability that at most 170 favor the school?
c. What is the probability that more than 160 favor the school?
d. What is the probability that fewer than 145 favor the school?
e. What is the probability that exactly 180 favor the school?
ii. The annual number of earthquakes registering at least 2.5 on the Richter Scale and having an epicenter within 40 miles of downtown Memphis follows a Poisson distribution with mean 6.5.
a. What is the probability that at least 9 such earthquakes will strike next year?
b. What is the probability that at least 25 such earthquakes will strike during the next 5 years?
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