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A pharmaceutical company wants to test the effectiveness of their new chronic pain drug. They give one group of 35 people with chronic pain the drug and 20 of them had their pain reduced. The company gives another group of 35 people with chronic pain a placebo and 15 of them had their pain reduced. Construct a 98% Confidence Interval for the difference of the proportion between the drug group and the placebo group. Using a significance level of .01, test the claim that the drug is effective using a hypothesis test of the difference of the proportions.
Suppose that patrons of a restaurant were asked whether they preferred beer or whether they preferred wine. 70% said that they preferred beer. 60% of the patrons were male. 80% of the males preferred beer.
when 100 students took a test the average score was 77.1. two more students took the test. the sum of their scores was
customers arrive at a single server facility at poisson rate of 40 per hour. when two or fewer customers are present a
A recent survey of 50 executives who were laid off durning a recent recession revealed it took a mean of 26 weeks for them to find another position. The standard deviation of the sample was 6.2 weeks. Construct a 95 percent confidence interval for..
The probability that the residents?own 2 cars is 55%. Of the households surveyed, 60% had incomes over $50,000. The probability that the? residents of a household own 2 cars is?
Let the following all-integer linear program: Solve LP problem and recognize the feasible region, corner point solutions, and optimal solution.
Eighteen (18) people in a department of 162 are fully trained in CPR and AED. A person shows signs of a heart attack. Five (5) people respond. What is the probability that NO (0) person who responded is trained to treat the victim? (Show all of yo..
State the null hypothesis H 0 and the alternative hypothesis H 1 that we would use for this test. Determining null and alternative hypotheses for the height of a plant.
the average age of vehicles registered in the united states is 96 months. assume the population is normally distributed
1. a large tank of fish from a hatchery is being delivered to a lake. the hatchery claims that the mean length of fish
What is the probability that a new cup will overflow when filled by the automatic dispenser? At what value should the mean amount dispensed by the machine be set to satisfy this wish?
What is the difference between a causal model and a time- series model? Give an example of when each would be used. What are some of the problems and drawbacks of the moving average forecasting model?
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