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Health care satisfaction. A November 2011 Gallup Poll of 1012 adults found that 607 are satisfied with the total cost they pay for their health care. The announced margin of error is plus or minus 4 percentage points. The announced confidence level is 95%.
a) What is the value of the sample proportion p who so they are satisfied with the total cost they pay for their health care? Explain in words what the population parameter p is in this setting.
b) Make a confidence statement about the parameter p.
In a one shot game, if you promote and your rival promotes, you will earn $7 million and your rival will earn $2 million in profits.
The standard deviation of fresh fruit consumption is about 30 pounds. Suppose a researcher took a random sample of 38 people and had them keep a record of the fresh fruit they ate for one year.
Ashland MultiComm Services (AMS) is a residential telecommunications provider. The AMS technical services department has embarked on a quality improvement program. Its first project relates to maintaining the target upload speed for its Internet s..
Assume that the relationship between the growth of a fish population and the population size can be expressed as g = 2P - 0.1P, where g is the growth in tons and P is the size of the population (in thousands of tons).
Suppose 70% of kids who visit the doctor have a fever, and 15% of kids with a fever have a sore throat. Whats the probability that a kid who goes to the doctor has a fever and a sore throat?
Calculate the right-hand-side of constraint 1 to 11 (instead of 10) and solve the problem. How much did the profit increase as a result of this?
A famous hypnotist performs to a crowd of 350 students and 180 non-students. The hypnotist knows from previous experience that one half of the students and two third on the non-students are hypnotizable.
Radon levels in a house vary from week to week. In one house a sample of 8 weeks had the following readings for radon level ( in pCi/L): 1.9, 2.8, 5.7, 4.2, 1.9, 8.6, 3.9, 7.2
Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more? Why or why not?
Three students, Jim, Joan, and Jethroe are registered for the same class and attend independently to each other, Jim 95.7% of the time, Joan 92.3% of the time, and Jethroe 82.8% of the time. What is the probability that on any given day:
The market for olive oil in new York City is controlled by 2-families, Sopranos and Contraltos. Both families will ruthlessly eliminate any other family that attempts to enter New York City olive oil market.
How many samples would be required if we wished to obtain the maximum possible number of samples needed (i.e., we do not want to rely on the 37% estimate from above) with a 95% confidence and 0.03 error?
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