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In a clinical trial of a? vaccine, 12,000 children were randomly divided into two groups. The subjects in group 1? (the experimental? group) were given the vaccine while the subjects in group 2? (the control? group) were given a placebo. 6,000 children in the experimental? group,73 developed the disease. Of 6,000 children in the control? group,119 developed the disease.
In a factory producing television sets, every 100th set produced is inspected. Is the collection of sets inspected a simple random sample.
A membership drive in a metropolitan area resulted in 500 new members. What is the probability that 175 or more of the new members are significantly overweight?
the main advantage of experiments over observational studies is thata well-designed experiment can give good evidence
samples of three materials under consideration for the housing of machinery on a seagoing vessel are tested by means of
Data is given in the table below. Process data as illustrate in the paper on the Mann-Whitney U test. Critical Value:Test Statistic (Show procedure.)Z .
Biology and Environmental Science Piers on public beaches are usually supported by widely spread piles or pillars and can extend a thousand feet into the ocean.
urn 1 has five white and seven black balls. urn 2 has three white and twelve black balls. we flip a fair coin. if the
1. How would you communicate a data security policy that required software checking of employees' emails?
Compute the 99% confidence interval for the proportion of clocks with errors in assembly and interpret this confidence interval.
How did the Protestant Reformation in England occur? What was the cause for the reformation? What events led to this change, and what impact did these changes have on England?
six individuals including a and b take seats around a circular table in a completely random fashion. suppose the seats
Find the standard error of the mean Also establish an interval estimate around the sample mean using one standard deviation of the mean.
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