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It is your birthday and you are waiting for someone to write you a birthday message on
Facebook. On average (on your birthday) you receive a facebook message every 10 minutes.
Assume that the times between the birthday messages are independent.
a) What is the probability the next posting takes 15 minutes or longer to appear?
b) What is the standard deviation of the time between birthday postings?
c) What is the probability that it takes 12.5 minutes for the next birthday posting?
d) Suppose that the most recent birthday posting was done at 1:40 pm and it is now 1:45 pm.
What is the probability that you will have to wait until 1:53 pm or later for the next message?
e) What is your median waiting time for birthday messages?
The number of hurricanes that are formed during each hurricane season can be modeled using the Poisson probability distribution. History suggests that the average if number of hurricanes formed during a year is 6.0 hurricanes.
Using the original data, estimate the population standard deviation with 90% probability.
question a manufacturer of chocolate candies uses machines to package candies as they move along a filling
Suppose that you roll 2 dice and consider the sum of the two. Let A be the event of throwing odd, B be the event of throwing 4 or less and C be the event of throwing a multiple of 3.a) What is the sample space S and the corresponding probability of e..
With a selling price of 40 dollars each, how many pool cues must be sold to break even? What would the total revenue be at this break even point?
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assume that adults have iq scores that are normally distributed with a mean of 100 and a standarddeviation of 15 as on
Create a 95% confidence interval for the population mean days absent for sickness based on this sample. Select the answer closest to your results.
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