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The effect of non-Normality. The populations in the two previous exercises have the same mean and standard deviation, but one is very close to Normal and the other is strongly non-Normal. Based on your work in these exercises, how does non-Normality of the population affect the bootstrap distribution of x? How does it affect the bootstrap standard error?
Do either of these effects diminish when we start with a larger sample? Explain what you have observed based on what you know about the sampling distribution of x‾ and the way in which bootstrap distributions mimic the sampling distribution.
Let X be a single observation of an Exp(λ) random variable, which has pdf λ(x) =λ exp(-λx) if x ≥ 0, 0 if x
Describe the vocabulary and principles of hypothesis testing. Discuss application of course content to professional contexts. Use technological tools to solve problems in statistics.
A sociologist wants to find the relationship between attitude toward women's right (numerical variable with range 0-100), age of the respondent in years, gender, and level of education (less than high school, some college, bachelor's degree or higher..
Select at least three research articles from peer-reviewed journals which report on research projects using inferential statistics.
What is an interaction? Describe an example and identify the variables within your population (work, social, academic, etc.) for which you might expect interactions?
Determine the number of stores that must be sampled in order to estimate the true proportion to within 0.05 with 95% confidence using the large-sample method.
A researcher wishes to estimate, with 95%confidence, the population proportion of adults who think the president of their country can control the price of gasoline. Her estimate must be accurate within 55%of the true proportion. a) No preliminary est..
A sample survey funded by the National Science Foundation asked a random sample of American adults about biological evolution. One question asked survey participants to answer "True", "False" or "Not sure" to the statement "Human beings, as we ..
Assume an attempted break-in occurs. Use the binomial distribution to find the probability that at least one of the four security systems will detect it.
How would you interpret these results in terms of the likely precision of the sample means as estimators of their respective population means?
Discuss the differences between Parametric and nonparametric tests. Include a reference source.
The appraisals (in thousands of dollars) are contained in data file XR02027. Construct stem-and-leaf and dotplot displays describing the appraisal data.
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