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Is a flu shot really effective? In 2012-2013 the CDC reported that the flu vaccine was 56% effective. That is, 56% of all people receiving the flu vaccine who were exposed to a flu virus did not contract the flu. To check this claim (56% effective), a random sample of 50 at-risk people who received a flu shot was selected.
During the flu season, all 50 were exposed to the flu and 29 actually contracted the disease. Is there any evidence to suggest the claim is false, that the chance of contracting the flu is greater than 44%?
How Many Would Want a Female US President
after computing a confidence interval the user believes the results are meaningless because the width of the interval
Also, the sample data appear to have a bell-shaped distribution. Construct the 95% confidence interval for the mean time spent on paperwork by all managers.
What is the probability that in the next 15 minutes information about 10 or fewer potential customers arrives and what is the probability that 3 or fewer of the calls are successful
construct a frequency distribution table and describe the shape of the distribution, what score identifies the center for the distribution and are the scores clustered or spread across the scale?
Find the probability that in a sample of 10 tools chosen at random exactly 2 will be defective by using (a) the binomial distribution and (b) the Poisson approximation to the binomial distribution.
you complete a hypothesis test using o= .05 and based on the evidence from the sample your decisions to fail to reject the null hypothesis. if the treatment actually does have an effect, which of the following is true?
How many plants must be sampled if no preliminary estimate is available? If less than that many plants is sampled, which answer best describes what happened?
What symbol is used to represent the mean of the sampling distribution of y-(ybar)? Explain and what symbol is used to represent one value from the sampling distribution of y-(ybar)? Explain
The owner of a fish market has an assistant who has determined that the weights of catfish are normally distributed, with a mean of 3.2 pounds and a standard deviaition of 0.8 pound.
What are the benefits of using control charts?- Explain the difference between common causes and special causes. Give examples of each.
computing the mean and standard deviation for the given data.1.a population of scores has micro 50 and s 12. if you
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