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Question: Suppose an influenza epidemic strikes a city. In 10% of families the mother has influenza; in 10% of families the father has influenza; and in 2% of families both the mother and father have influenza.
a. Are the events A1 = {mother has influence} and A2 = {father has influenza} independent?
Construct a 90% confidence interval for the population proportion, p, in order to test the claim from a confidence interval point of view. What is the best point estimate for p?
a client gives you a data set of 30 observed values that represent the number of gallons of gas that 30 individual
x1, x2, x3 are zero mean Gaussian random variables with STD=4. Let x1 and x2 be independent and x3= a*x1+b*x2. Find the constants “a” and “b” such that the correlation between x1 and x3 is 0.3. What is the correlation between x3 and x2?
At 95% confidence, test to determine if more than 21% of the population will like the new soft drink.
Where should the warranty limits be set so that only 10 percent of the HDTVs need repairs at the manufacturer's expense?
How large should the sample size be if she wishes to be accurate within $0.10. A previous study showed that the standard deviation of the price was $.12.
an electrical distribution system consists of 3 subsystems in parallel with the following individual subsystem
Determine change in average number of weekly viewers from to?
Illustrate what is the probability all four calls are infact emergencies. Illustrate what is the probability that three or more calls are not emergencies.
Interview the officers of every fraternity at each of these 30 institutions. Is this a simple random sample, cluster random sample, or stratified random sample?
Can the value 0.64 be rejected if a survey of 495 homes in Omaha yields 332 with one or more lawn mowers? Use = 0.05.
q1. a manufacturing company measures the weight of boxes before shipping them to the customers. if the box weights have
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