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A chemical reaction was studied by making 10 runs with a new supposedly improved method (B) and· 10 runs with the standard method {A). The following yield results were obtained:
The superscripts in parentheses denote the time order in which the runs were made. Comment on the data and analyze them.
In Exercise 8.16, you examined the proportion of high school students who cheated on tests at least twice during the past year. Included in that study were the results for both 2002 and 2004.
Assume that in each cycle, the machine can produce either a good or a defective part according to the Bernoulli quality model.
They conduct a survey of 100 clients which yields an average age of 32 years with a standard deviation of seven years. Determine a 98% confidence interval.
The scores of individual students on the American College Testing (ACT) program composite College Entrance Examination have a normal distribution with mean 18.6 and standard deviation 6.0. What is the probability that a randomly selected individua..
Production technologies, terroir, and quality of Bordeaux wine. In addition to state-of-the-art technologies, the production of quality wine is strongly.
Suppose the annual return on XYZ stock follows a normal distribution with mean 12% and standard deviation 30%. What is the probability that XYZ's value.
There is a worker error is 0.3, and the probability that an accident will occur when there is no worker error is 0.2. Find the probability of a worker error if there was an accident.
Health conditions and risk behaviors. The data file BRFSS gives several variables related to health conditions and risk behaviors as well as demographic.
Suppose that in NY State, 35% of voters are Democrats, 30% are Republicans, and 11% are independent. You are conducting a poll by randomly calling registered voters. In your first four calls, what is the probability that you talk to:
In a study of smokers who tried to quit smoking with nicotine patch therapy, 39 were smoking one year after the treatment, and 32 were not smoking one year after the treatment.
What is the cutoff for high leverage in this scenario? Using the rule-of-thumb for leverages presented in class, state whether this point has high leverage?
an exit poll of 1000 randomly selected voters found that 515 favored candidate a. is the race too close to call? answer
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