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Question: Do placebos really work? Researchers in Japan conducted an experiment on 13 individuals who were extremely allergic to poison ivy. On one arm, each subject was rubbed with a poison ivy leaf and told the leaf was harmless. On the other arm, each subject was rubbed with a harmless leaf and told it was poison ivy. All the subjects developed a rash on the arm where the harmless leaf was rubbed. Of the 13 subjects, 11 did not have any reaction to the real poison ivy leaf.40 Explain how the results of this study support the idea of a placebo effect.
write a 1050- to 1750-word paper describing a hypothesis test to perform on that data using a one or two-sample z test
when is it appropriate to use an anova? what is the key piece of information you must know in order to
A recent study of cardiovascular risk factors reports that 30% of adults meet the criteria of hypertension. if 15 adults are assessed, what is the probabiliy that?
Based on your experience using ANOVA and Nonparametric tests, what additional information would you recommend to the key decision maker solve the challenges given in a company that provides software solutions to wide range of clients?
spare servers are maintained in stock to support it operations. a study determined that on average there are four
Entire commercial airline industry, consider a random sample of 200 flights. What is the expected number that will arrive on time? What is the standard deviation of this distribution.
the labor bureau wants to estimate at a 98 confidence level the proportion of all households that receive welfare. the
Using the results, describe the effect of an outlier or extreme value on the confidence interval.
They kept track of the mother s age, the number of weeks the pregnancy lasted, the type of birth the level of prenatal care the mother had, the birth weight and sex of the baby, and whether the baby exhibited health problems.
Is the effect of the medicine significant at the 5 percent level?
Using the probabilities found in part (a), find the expected frequency for each category. Find the probability of a randomly selected subject belonging to each class. (Use class boundaries of 79.5, 95.5, 110.5, and 120.5.)
When calculating the sample variance, what procedure is necessary to ensure that s2 will be an unbiased estimator of σ2? Will s be an unbiased estimator of σ?
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