Question

The average annual precipitation for a large midwest city is 30.85 inches with a standard deviation of 3.6 inches. Assume the variable is normally distributed. Find the probability that the mean of a random sample of 32 months will have a mean less than 30 inches.

Find less than 30 inches the probability that the mean of a random sample of 32 months will have a mean An insurance company says that 15% of all fires are caused a) Find the probability that among 5 fires exactly 2 are caused by arson. b) Find the expected inumber and standard deviation of arson fires out of 25 by arson. 6. A new serum is claimed to be 80% effective in preventing the commor, cold A random sample of 11 people are injected with the serum. The serum is considered successful if someone who has taken it survives the winter without a cold. a) Find the probability that more than 8 people injected will survive the winter without a cold b) If 100 people are injected, find the expected number ( mean) of people in this sample who will survive the winter without a cold. 0ss-0.03

Answer 1

Dear student HOMEWORKLIB POLICY allowed only one solution at a time . Please repost others thank you!